Fix some Android Studio inspection warnings

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=173085316

library/core/src/main/java/com/google/android/exoplayer2/Renderer.java

@@ -226,7 +226,7 @@ public interface Renderer extends ExoPlayerComponent {
 
   /**
    * Whether the renderer is ready for the {@link ExoPlayer} instance to transition to
-   * {@link ExoPlayer#STATE_ENDED}. The player will make this transition as soon as {@code true} is
+   * {@link Player#STATE_ENDED}. The player will make this transition as soon as {@code true} is
    * returned by all of its {@link Renderer}s.
    * <p>
    * This method may be called when the renderer is in the following states:

library/core/src/main/java/com/google/android/exoplayer2/RenderersFactory.java

@@ -31,7 +31,7 @@ public interface RenderersFactory {
    *
    * @param eventHandler A handler to use when invoking event listeners and outputs.
    * @param videoRendererEventListener An event listener for video renderers.
-   * @param videoRendererEventListener An event listener for audio renderers.
+   * @param audioRendererEventListener An event listener for audio renderers.
    * @param textRendererOutput An output for text renderers.
    * @param metadataRendererOutput An output for metadata renderers.
    * @return The {@link Renderer instances}.

library/core/src/main/java/com/google/android/exoplayer2/audio/AudioSink.java

@@ -202,8 +202,7 @@ public interface AudioSink {
    * @param trimStartSamples The number of audio samples to trim from the start of data written to
    *     the sink after this call.
    * @param trimEndSamples The number of audio samples to trim from data written to the sink
-   *     immediately preceding the next call to {@link #reset()} or
+   *     immediately preceding the next call to {@link #reset()} or this method.
-   *     {@link #configure(String, int, int, int, int, int[], int, int)}.
    * @throws ConfigurationException If an error occurs configuring the sink.
    */
   void configure(String inputMimeType, int inputChannelCount, int inputSampleRate,

library/core/src/main/java/com/google/android/exoplayer2/drm/DefaultDrmSession.java

@@ -86,6 +86,7 @@ import java.util.UUID;
 
   /* package */ final MediaDrmCallback callback;
   /* package */ final UUID uuid;
+  /* package */ final PostResponseHandler postResponseHandler;
 
   private @DrmSession.State int state;
   private int openCount;
@@ -96,8 +97,6 @@ import java.util.UUID;
   private byte[] sessionId;
   private byte[] offlineLicenseKeySetId;
 
-  /* package */ PostResponseHandler postResponseHandler;
-
   /**
    * Instantiates a new DRM session.
    *

library/core/src/main/java/com/google/android/exoplayer2/drm/ExoMediaDrm.java

@@ -205,7 +205,7 @@ public interface ExoMediaDrm<T extends ExoMediaCrypto> {
    *
    * @param initData Opaque initialization data specific to the crypto scheme.
    * @return An object extends {@link ExoMediaCrypto}, using opaque crypto scheme specific data.
-   * @throws MediaCryptoException
+   * @throws MediaCryptoException If the instance can't be created.
    */
   T createMediaCrypto(byte[] initData) throws MediaCryptoException;
 

library/core/src/main/java/com/google/android/exoplayer2/extractor/mkv/MatroskaExtractor.java

@@ -242,7 +242,7 @@ public final class MatroskaExtractor implements Extractor {
    * The value by which to divide a time in microseconds to convert it to the unit of the last value
    * in a subrip timecode (milliseconds).
    */
-  private static long SUBRIP_TIMECODE_LAST_VALUE_SCALING_FACTOR = 1000;
+  private static final long SUBRIP_TIMECODE_LAST_VALUE_SCALING_FACTOR = 1000;
   /**
    * The format of a subrip timecode.
    */
@@ -270,7 +270,7 @@ public final class MatroskaExtractor implements Extractor {
    * The value by which to divide a time in microseconds to convert it to the unit of the last value
    * in an SSA timecode (1/100ths of a second).
    */
-  private static long SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR = 10000;
+  private static final long SSA_TIMECODE_LAST_VALUE_SCALING_FACTOR = 10000;
   /**
    * A special end timecode indicating that an SSA subtitle should be displayed until the next
    * subtitle, or until the end of the media in the case of the last subtitle.

library/core/src/main/java/com/google/android/exoplayer2/extractor/mp4/Mp4Extractor.java

@@ -28,7 +28,6 @@ import com.google.android.exoplayer2.extractor.PositionHolder;
 import com.google.android.exoplayer2.extractor.SeekMap;
 import com.google.android.exoplayer2.extractor.TrackOutput;
 import com.google.android.exoplayer2.extractor.mp4.Atom.ContainerAtom;
-import com.google.android.exoplayer2.extractor.mp4.FragmentedMp4Extractor.Flags;
 import com.google.android.exoplayer2.metadata.Metadata;
 import com.google.android.exoplayer2.util.Assertions;
 import com.google.android.exoplayer2.util.NalUnitUtil;

library/core/src/main/java/com/google/android/exoplayer2/metadata/id3/ChapterTocFrame.java

@@ -101,8 +101,8 @@ public final class ChapterTocFrame extends Id3Frame {
     dest.writeByte((byte) (isOrdered ? 1 : 0));
     dest.writeStringArray(children);
     dest.writeInt(subFrames.length);
-    for (int i = 0; i < subFrames.length; i++) {
+    for (Id3Frame subFrame : subFrames) {
-      dest.writeParcelable(subFrames[i], 0);
+      dest.writeParcelable(subFrame, 0);
     }
   }
 

library/core/src/main/java/com/google/android/exoplayer2/source/ClippingMediaSource.java

@@ -37,7 +37,6 @@ public final class ClippingMediaSource implements MediaSource, MediaSource.Liste
   private final ArrayList<ClippingMediaPeriod> mediaPeriods;
 
   private MediaSource.Listener sourceListener;
-  private ClippingTimeline clippingTimeline;
 
   /**
    * Creates a new clipping source that wraps the specified source.
@@ -117,8 +116,7 @@ public final class ClippingMediaSource implements MediaSource, MediaSource.Liste
 
   @Override
   public void onSourceInfoRefreshed(Timeline timeline, Object manifest) {
-    clippingTimeline = new ClippingTimeline(timeline, startUs, endUs);
+    sourceListener.onSourceInfoRefreshed(new ClippingTimeline(timeline, startUs, endUs), manifest);
-    sourceListener.onSourceInfoRefreshed(clippingTimeline, manifest);
     int count = mediaPeriods.size();
     for (int i = 0; i < count; i++) {
       mediaPeriods.get(i).setClipping(startUs, endUs);

library/core/src/main/java/com/google/android/exoplayer2/source/ConcatenatingMediaSource.java

@@ -40,10 +40,10 @@ public final class ConcatenatingMediaSource implements MediaSource {
   private final Map<MediaPeriod, Integer> sourceIndexByMediaPeriod;
   private final boolean[] duplicateFlags;
   private final boolean isAtomic;
+  private final ShuffleOrder shuffleOrder;
 
   private Listener listener;
   private ConcatenatedTimeline timeline;
-  private ShuffleOrder shuffleOrder;
 
   /**
    * @param mediaSources The {@link MediaSource}s to concatenate. It is valid for the same

library/core/src/main/java/com/google/android/exoplayer2/source/ExtractorMediaSource.java

@@ -19,7 +19,6 @@ import android.net.Uri;
 import android.os.Handler;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.ExoPlayer;
-import com.google.android.exoplayer2.Timeline;
 import com.google.android.exoplayer2.extractor.DefaultExtractorsFactory;
 import com.google.android.exoplayer2.extractor.Extractor;
 import com.google.android.exoplayer2.extractor.ExtractorsFactory;
@@ -84,7 +83,6 @@ public final class ExtractorMediaSource implements MediaSource, ExtractorMediaPe
   private final int minLoadableRetryCount;
   private final Handler eventHandler;
   private final EventListener eventListener;
-  private final Timeline.Period period;
   private final String customCacheKey;
   private final int continueLoadingCheckIntervalBytes;
 
@@ -149,7 +147,6 @@ public final class ExtractorMediaSource implements MediaSource, ExtractorMediaPe
     this.eventListener = eventListener;
     this.customCacheKey = customCacheKey;
     this.continueLoadingCheckIntervalBytes = continueLoadingCheckIntervalBytes;
-    period = new Timeline.Period();
   }
 
   @Override
@@ -187,7 +184,7 @@ public final class ExtractorMediaSource implements MediaSource, ExtractorMediaPe
   public void onSourceInfoRefreshed(long durationUs, boolean isSeekable) {
     // If we already have the duration from a previous source info refresh, use it.
     durationUs = durationUs == C.TIME_UNSET ? timelineDurationUs : durationUs;
-    if (timelineDurationUs == durationUs && timelineIsSeekable == isSeekable
+    if ((timelineDurationUs == durationUs && timelineIsSeekable == isSeekable)
         || (timelineDurationUs != C.TIME_UNSET && durationUs == C.TIME_UNSET)) {
       // Suppress no-op source info changes.
       return;

library/core/src/main/java/com/google/android/exoplayer2/text/cea/CeaUtil.java

@@ -82,7 +82,7 @@ public final class CeaUtil {
    * number of 0xFF bytes and T is the value of the terminating byte.
    *
    * @param buffer The buffer from which to read the value.
-   * @returns The read value, or -1 if the end of the buffer is reached before a value is read.
+   * @return The read value, or -1 if the end of the buffer is reached before a value is read.
    */
   private static int readNon255TerminatedValue(ParsableByteArray buffer) {
     int b;

library/core/src/main/java/com/google/android/exoplayer2/upstream/cache/Cache.java

@@ -140,7 +140,7 @@ public interface Cache {
    * @param key The key of the data being requested.
    * @param position The position of the data being requested.
    * @return The {@link CacheSpan}.
-   * @throws InterruptedException
+   * @throws InterruptedException If the thread was interrupted.
    */
   CacheSpan startReadWrite(String key, long position) throws InterruptedException, CacheException;
 

library/smoothstreaming/src/androidTest/java/com/google/android/exoplayer2/source/smoothstreaming/manifest/SsManifestTest.java

@@ -32,7 +32,7 @@ import junit.framework.TestCase;
  */
 public class SsManifestTest extends TestCase {
 
-  private static ProtectionElement DUMMY_PROTECTION_ELEMENT =
+  private static final ProtectionElement DUMMY_PROTECTION_ELEMENT =
       new ProtectionElement(C.WIDEVINE_UUID, new byte[] {0, 1, 2});
 
   public void testCopy() throws Exception {

library/ui/src/main/res/drawable-anydpi-v21/exo_controls_shuffle.xml

@@ -21,6 +21,6 @@
     <path
         android:fillColor="#FFFFFFFF"
         android:pathData="M10.59 9.17L5.41 4 4 5.41l5.17 5.17 1.42-1.41zM14.5 4l2.04 2.04L4 18.59 5.41 20
-17.96 7.46 20 9.5V4h-5.5zm.33 9.41l-1.41 1.41 3.13 3.13L14.5 20H20v-5.5l-2.04
+17.96 7.46 20 9.5V4h-5.5zm0.33 9.41l-1.41 1.41 3.13 3.13L14.5 20H20v-5.5l-2.04
 2.04-3.13-3.13z" />
 </vector>

playbacktests/src/androidTest/java/com/google/android/exoplayer2/playbacktests/gts/DashDownloadTest.java

@@ -170,7 +170,7 @@ public final class DashDownloadTest extends ActivityInstrumentationTestCase2<Hos
 
   private static class TestProgressListener implements ProgressListener {
 
-    private float stopAt;
+    private final float stopAt;
 
     private TestProgressListener(float stopAt) {
       this.stopAt = stopAt;

testutils/src/main/java/com/google/android/exoplayer2/testutil/FakeSimpleExoPlayer.java

@@ -134,7 +134,7 @@ public class FakeSimpleExoPlayer extends SimpleExoPlayer {
 
     @Override
     public void setPlayWhenReady(boolean playWhenReady) {
-      if (playWhenReady != true) {
+      if (!playWhenReady) {
         throw new UnsupportedOperationException();
       }
     }
@@ -339,7 +339,7 @@ public class FakeSimpleExoPlayer extends SimpleExoPlayer {
 
     @Override
     public void prepare(final MediaSource mediaSource, boolean resetPosition, boolean resetState) {
-      if (resetPosition != true || resetState != true) {
+      if (!resetPosition || !resetState) {
         throw new UnsupportedOperationException();
       }
       this.mediaSource = mediaSource;