Add remaining proguard config tests.

This ensures we have full test coverage for proguard configs now.
The only configs not covered by tests are:
 - IMA and OkHttp which copy recommended configs from the respective
   library. I couldn't reproduce failures by removing them (and thus
   couldn't write a test that ensures they are correct).
 - Some dontwarn lines that just suppress warnings.

In addition, this change fixes a couple of related issues:
 - Moved AV1 proguard config to correct module.
 - Removed mentioning of deprecated ExtractorMediaSource from README
 - Suppressed warning from IMA code that prevent proguarding under
   strict rules
 - Fixed wrong proguard exclusion in VP9 module.
 - Moved FLAC exclusion (DefaultExtractorsFactory) to correct module.
 - Added AlertDialog suppression for de-jetified code.
 - Removed unusued dependency from UI module that causes large APK
   size increase.

#exofixit
#minor-release

PiperOrigin-RevId: 344427532

extensions/av1/proguard-rules.txt

@@ -5,3 +5,7 @@
     native <methods>;
 }
 
+# Some members of this class are being accessed from native methods. Keep them unobfuscated.
+-keep class com.google.android.exoplayer2.video.VideoDecoderOutputBuffer {
+  *;
+}

extensions/av1/src/main/java/com/google/android/exoplayer2/ext/av1/Gav1Decoder.java

@@ -15,10 +15,12 @@
  */
 package com.google.android.exoplayer2.ext.av1;
 
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
 import static java.lang.Runtime.getRuntime;
 
 import android.view.Surface;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
 import com.google.android.exoplayer2.decoder.SimpleDecoder;
@@ -28,7 +30,8 @@ import com.google.android.exoplayer2.video.VideoDecoderOutputBuffer;
 import java.nio.ByteBuffer;
 
 /** Gav1 decoder. */
-/* package */ final class Gav1Decoder
+@VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+public final class Gav1Decoder
     extends SimpleDecoder<VideoDecoderInputBuffer, VideoDecoderOutputBuffer, Gav1DecoderException> {
 
   // LINT.IfChange

extensions/av1/src/main/proguard-rules.pgcfg

@@ -0,0 +1 @@
+../../proguard-rules.txt

extensions/flac/README.md

@@ -68,7 +68,7 @@ renderer.
 
 ### Using `FlacExtractor` ###
 
-`FlacExtractor` is used via `ExtractorMediaSource`. If you're using
+`FlacExtractor` is used via `ProgressiveMediaSource`. If you're using
 `DefaultExtractorsFactory`, `FlacExtractor` will automatically be used to read
 `.flac` files. If you're not using `DefaultExtractorsFactory`, return a
 `FlacExtractor` from your `ExtractorsFactory.createExtractors` implementation.

extensions/flac/src/main/java/com/google/android/exoplayer2/ext/flac/FlacDecoder.java

@@ -15,7 +15,10 @@
  */
 package com.google.android.exoplayer2.ext.flac;
 
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
+
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.Format;
 import com.google.android.exoplayer2.ParserException;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
@@ -27,11 +30,10 @@ import java.io.IOException;
 import java.nio.ByteBuffer;
 import java.util.List;
 
-/**
+/** Flac decoder. */
- * Flac decoder.
+@VisibleForTesting(otherwise = PACKAGE_PRIVATE)
- */
+public final class FlacDecoder
-/* package */ final class FlacDecoder extends
+    extends SimpleDecoder<DecoderInputBuffer, SimpleOutputBuffer, FlacDecoderException> {
-    SimpleDecoder<DecoderInputBuffer, SimpleOutputBuffer, FlacDecoderException> {
 
   private final FlacStreamMetadata streamMetadata;
   private final FlacDecoderJni decoderJni;

extensions/ima/proguard-rules.txt

@@ -1,5 +1,6 @@
 # Proguard rules specific to the IMA extension.
 
+-dontwarn com.google.ads.interactivemedia.**
 -keep class com.google.ads.interactivemedia.** { *; }
 -keep interface com.google.ads.interactivemedia.** { *; }
 -keep class com.google.obf.** { *; }

extensions/opus/src/main/java/com/google/android/exoplayer2/ext/opus/OpusDecoder.java

@@ -15,7 +15,10 @@
  */
 package com.google.android.exoplayer2.ext.opus;
 
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
+
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.audio.OpusUtil;
 import com.google.android.exoplayer2.decoder.CryptoInfo;
@@ -30,7 +33,8 @@ import java.nio.ByteBuffer;
 import java.util.List;
 
 /** Opus decoder. */
-/* package */ final class OpusDecoder
+@VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+public final class OpusDecoder
     extends SimpleDecoder<DecoderInputBuffer, SimpleOutputBuffer, OpusDecoderException> {
 
   private static final int NO_ERROR = 0;

extensions/vp9/proguard-rules.txt

@@ -6,6 +6,6 @@
 }
 
 # Some members of this class are being accessed from native methods. Keep them unobfuscated.
--keep class com.google.android.exoplayer2.ext.vp9.VpxOutputBuffer {
+-keep class com.google.android.exoplayer2.video.VideoDecoderOutputBuffer {
     *;
 }

extensions/vp9/src/main/java/com/google/android/exoplayer2/ext/vp9/VpxDecoder.java

@@ -15,8 +15,11 @@
  */
 package com.google.android.exoplayer2.ext.vp9;
 
+import static androidx.annotation.VisibleForTesting.PACKAGE_PRIVATE;
+
 import android.view.Surface;
 import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
 import com.google.android.exoplayer2.C;
 import com.google.android.exoplayer2.decoder.CryptoInfo;
 import com.google.android.exoplayer2.decoder.DecoderInputBuffer;
@@ -30,7 +33,8 @@ import com.google.android.exoplayer2.video.VideoDecoderOutputBuffer;
 import java.nio.ByteBuffer;
 
 /** Vpx decoder. */
-/* package */ final class VpxDecoder
+@VisibleForTesting(otherwise = PACKAGE_PRIVATE)
+public final class VpxDecoder
     extends SimpleDecoder<VideoDecoderInputBuffer, VideoDecoderOutputBuffer, VpxDecoderException> {
 
   // These constants should match the codes returned from vpxDecode and vpxSecureDecode functions in

library/core/proguard-rules.txt

@@ -5,17 +5,6 @@
   public static android.net.Uri buildRawResourceUri(int);
 }
 
-# Methods accessed via reflection in DefaultExtractorsFactory
--dontnote com.google.android.exoplayer2.ext.flac.FlacLibrary
--keepclassmembers class com.google.android.exoplayer2.ext.flac.FlacLibrary {
-  public static boolean isAvailable();
-}
-
-# Some members of this class are being accessed from native methods. Keep them unobfuscated.
--keep class com.google.android.exoplayer2.video.VideoDecoderOutputBuffer {
-  *;
-}
-
 # Constructors accessed via reflection in DefaultRenderersFactory
 -dontnote com.google.android.exoplayer2.ext.vp9.LibvpxVideoRenderer
 -keepclassmembers class com.google.android.exoplayer2.ext.vp9.LibvpxVideoRenderer {

library/extractor/proguard-rules.txt

@@ -1,10 +1,14 @@
 # Proguard rules specific to the extractor module.
 
-# Constructors accessed via reflection in DefaultExtractorsFactory
+# Methods accessed via reflection in DefaultExtractorsFactory
 -dontnote com.google.android.exoplayer2.ext.flac.FlacExtractor
 -keepclassmembers class com.google.android.exoplayer2.ext.flac.FlacExtractor {
   <init>(int);
 }
+-dontnote com.google.android.exoplayer2.ext.flac.FlacLibrary
+-keepclassmembers class com.google.android.exoplayer2.ext.flac.FlacLibrary {
+  public static boolean isAvailable();
+}
 
 # Don't warn about checkerframework and Kotlin annotations
 -dontwarn org.checkerframework.**

library/ui/proguard-rules.txt

@@ -11,6 +11,16 @@
   public androidx.appcompat.app.AlertDialog$Builder setNegativeButton(int, android.content.DialogInterface$OnClickListener);
   public androidx.appcompat.app.AlertDialog create();
 }
+-dontnote android.support.v7.app.AlertDialog.Builder
+-keepclassmembers class android.support.v7.app.AlertDialog$Builder {
+  <init>(android.content.Context, int);
+  public android.content.Context getContext();
+  public android.support.v7.app.AlertDialog$Builder setTitle(java.lang.CharSequence);
+  public android.support.v7.app.AlertDialog$Builder setView(android.view.View);
+  public android.support.v7.app.AlertDialog$Builder setPositiveButton(int, android.content.DialogInterface$OnClickListener);
+  public android.support.v7.app.AlertDialog$Builder setNegativeButton(int, android.content.DialogInterface$OnClickListener);
+  public android.support.v7.app.AlertDialog create();
+}
 
 # Don't warn about checkerframework and Kotlin annotations
 -dontwarn org.checkerframework.**