Remove NullableType usage from release branch

library/core/build.gradle

@@ -54,7 +54,6 @@ android {
 dependencies {
     implementation 'com.android.support:support-annotations:' + supportLibraryVersion
     compileOnly 'org.checkerframework:checker-qual:' + checkerframeworkVersion
-    compileOnly 'org.checkerframework:checker-compat-qual:' + checkerframeworkVersion
     androidTestImplementation 'com.google.dexmaker:dexmaker:' + dexmakerVersion
     androidTestImplementation 'com.google.dexmaker:dexmaker-mockito:' + dexmakerVersion
     androidTestImplementation 'com.google.truth:truth:' + truthVersion

library/core/src/main/java/com/google/android/exoplayer2/trackselection/DefaultTrackSelector.java

@@ -43,7 +43,6 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.atomic.AtomicReference;
-import org.checkerframework.checker.nullness.compatqual.NullableType;
 
 /**
  * A default {@link TrackSelector} suitable for most use cases. Track selections are made according
@@ -1214,7 +1213,7 @@ public class DefaultTrackSelector extends MappingTrackSelector {
 
     // Initialize the renderer configurations to the default configuration for all renderers with
     // selections, and null otherwise.
-    @NullableType RendererConfiguration[] rendererConfigurations =
+    RendererConfiguration[] rendererConfigurations =
         new RendererConfiguration[rendererCount];
     for (int i = 0; i < rendererCount; i++) {
       boolean forceRendererDisabled = params.getRendererDisabled(i);
@@ -1254,14 +1253,14 @@ public class DefaultTrackSelector extends MappingTrackSelector {
    *     disabled, unless RendererCapabilities#getTrackType()} is {@link C#TRACK_TYPE_NONE}.
    * @throws ExoPlaybackException If an error occurs while selecting the tracks.
    */
-  protected @NullableType TrackSelection[] selectAllTracks(
+  protected TrackSelection[] selectAllTracks(
       MappedTrackInfo mappedTrackInfo,
       int[][][] rendererFormatSupports,
       int[] rendererMixedMimeTypeAdaptationSupports,
       Parameters params)
       throws ExoPlaybackException {
     int rendererCount = mappedTrackInfo.getRendererCount();
-    @NullableType TrackSelection[] rendererTrackSelections = new TrackSelection[rendererCount];
+    TrackSelection[] rendererTrackSelections = new TrackSelection[rendererCount];
 
     boolean seenVideoRendererWithMappedTracks = false;
     boolean selectedVideoTracks = false;
@@ -1792,8 +1791,8 @@ public class DefaultTrackSelector extends MappingTrackSelector {
   private static void maybeConfigureRenderersForTunneling(
       MappedTrackInfo mappedTrackInfo,
       int[][][] renderererFormatSupports,
-      @NullableType RendererConfiguration[] rendererConfigurations,
-      @NullableType TrackSelection[] trackSelections,
+      RendererConfiguration[] rendererConfigurations,
+      TrackSelection[] trackSelections,
       int tunnelingAudioSessionId) {
     if (tunnelingAudioSessionId == C.AUDIO_SESSION_ID_UNSET) {
       return;

library/core/src/main/java/com/google/android/exoplayer2/trackselection/MappingTrackSelector.java

@@ -29,7 +29,6 @@ import com.google.android.exoplayer2.util.Util;
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 import java.util.Arrays;
-import org.checkerframework.checker.nullness.compatqual.NullableType;
 
 /**
  * Base class for {@link TrackSelector}s that first establish a mapping between {@link TrackGroup}s

library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectionArray.java

@@ -17,7 +17,6 @@ package com.google.android.exoplayer2.trackselection;
 
 import android.support.annotation.Nullable;
 import java.util.Arrays;
-import org.checkerframework.checker.nullness.compatqual.NullableType;
 
 /** An array of {@link TrackSelection}s. */
 public final class TrackSelectionArray {
@@ -25,13 +24,13 @@ public final class TrackSelectionArray {
   /** The length of this array. */
   public final int length;
 
-  private final @NullableType TrackSelection[] trackSelections;
+  private final TrackSelection[] trackSelections;
 
   // Lazily initialized hashcode.
   private int hashCode;
 
   /** @param trackSelections The selections. Must not be null, but may contain null elements. */
-  public TrackSelectionArray(@NullableType TrackSelection... trackSelections) {
+  public TrackSelectionArray(TrackSelection... trackSelections) {
     this.trackSelections = trackSelections;
     this.length = trackSelections.length;
   }
@@ -47,7 +46,7 @@ public final class TrackSelectionArray {
   }
 
   /** Returns the selections in a newly allocated array. */
-  public @NullableType TrackSelection[] getAll() {
+  public TrackSelection[] getAll() {
     return trackSelections.clone();
   }
 

library/core/src/main/java/com/google/android/exoplayer2/trackselection/TrackSelectorResult.java

@@ -17,7 +17,6 @@ package com.google.android.exoplayer2.trackselection;
 
 import com.google.android.exoplayer2.RendererConfiguration;
 import com.google.android.exoplayer2.util.Util;
-import org.checkerframework.checker.nullness.compatqual.NullableType;
 
 /**
  * The result of a {@link TrackSelector} operation.
@@ -30,7 +29,7 @@ public final class TrackSelectorResult {
    * A {@link RendererConfiguration} for each renderer. A null entry indicates the corresponding
    * renderer should be disabled.
    */
-  public final @NullableType RendererConfiguration[] rendererConfigurations;
+  public final RendererConfiguration[] rendererConfigurations;
   /**
    * A {@link TrackSelectionArray} containing the track selection for each renderer.
    */
@@ -49,8 +48,8 @@ public final class TrackSelectorResult {
    *     TrackSelector#onSelectionActivated(Object)} should the selection be activated.
    */
   public TrackSelectorResult(
-      @NullableType RendererConfiguration[] rendererConfigurations,
-      @NullableType TrackSelection[] selections,
+      RendererConfiguration[] rendererConfigurations,
+      TrackSelection[] selections,
       Object info) {
     this.rendererConfigurations = rendererConfigurations;
     this.selections = new TrackSelectionArray(selections);