Add a test for playing CompositionPlayer again after playback ends

A problem was discovered in Composition demo app where after playing a composition using CompositionPlayer, pressing the "play" button again would not restart the playback. This issue has been resolved, just adding a test to make sure we're not missing any regressions.

PiperOrigin-RevId: 735793488

Author: shahdDaghash

libraries/test_data/src/test/assets/audiosinkdumps/wav/sample.wav_playedTwice.dump

@@ -0,0 +1,66 @@
+AudioSink:
+  buffer count = 20
+  config:
+    pcmEncoding = 2
+    channelCount = 1
+    sampleRate = 44100
+  buffer #0:
+    time = 0
+    data = -85819864
+  buffer #1:
+    time = 100000
+    data = 566487491
+  buffer #2:
+    time = 200000
+    data = -1256531710
+  buffer #3:
+    time = 300000
+    data = 793455796
+  buffer #4:
+    time = 400000
+    data = -268235582
+  buffer #5:
+    time = 500000
+    data = -8136122
+  buffer #6:
+    time = 600000
+    data = 1750866613
+  buffer #7:
+    time = 700000
+    data = -1100753636
+  buffer #8:
+    time = 800000
+    data = 507833230
+  buffer #9:
+    time = 900000
+    data = 1472467506
+  buffer #10:
+    time = 0
+    data = -85819864
+  buffer #11:
+    time = 100000
+    data = 566487491
+  buffer #12:
+    time = 200000
+    data = -1256531710
+  buffer #13:
+    time = 300000
+    data = 793455796
+  buffer #14:
+    time = 400000
+    data = -268235582
+  buffer #15:
+    time = 500000
+    data = -8136122
+  buffer #16:
+    time = 600000
+    data = 1750866613
+  buffer #17:
+    time = 700000
+    data = -1100753636
+  buffer #18:
+    time = 800000
+    data = 507833230
+  buffer #19:
+    time = 900000
+    data = 1472467506

libraries/transformer/src/test/java/androidx/media3/transformer/CompositionPlayerAudioPlaybackTest.java

@@ -609,6 +609,33 @@ public void seekTo_singleSequenceWithClipping_outputsCorrectSamples() throws Exc
             + "_then_sample_rf64.wav_clipped_seek_to_800_ms.dump");
   }
 
+  @Test
+  public void playSingleSequence_replayAfterEnd_outputCorrectSamples() throws Exception {
+    CompositionPlayer player = createCompositionPlayer(context, capturingAudioSink);
+    EditedMediaItem editedMediaItem =
+        new EditedMediaItem.Builder(MediaItem.fromUri(ASSET_URI_PREFIX + FILE_AUDIO_RAW))
+            .setDurationUs(1_000_000L)
+            .build();
+    EditedMediaItemSequence sequence = new EditedMediaItemSequence.Builder(editedMediaItem).build();
+    Composition composition = new Composition.Builder(sequence).build();
+
+    player.setComposition(composition);
+    player.prepare();
+    // First Play
+    player.play();
+    TestPlayerRunHelper.advance(player).untilState(Player.STATE_ENDED);
+    // Second Play
+    player.seekToDefaultPosition();
+    player.play();
+    TestPlayerRunHelper.advance(player).untilState(Player.STATE_ENDED);
+    player.release();
+
+    DumpFileAsserts.assertOutput(
+        context,
+        capturingAudioSink,
+        PREVIEW_DUMP_FILE_EXTENSION + FILE_AUDIO_RAW + "_playedTwice.dump");
+  }
+
   private static CompositionPlayer createCompositionPlayer(Context context, AudioSink audioSink) {
     return new CompositionPlayer.Builder(context)
         .setClock(new FakeClock(/* isAutoAdvancing= */ true))