Reconfigure audio sink when PCM encoding changes

Note:
- Fixing this uncovers another bug in how audio processor draining
  works, so the test playlist still doesn't play correctly after this
  change.
- Once we reconfigure the audio sink based on the ExoPlayer Format
  rather than the codec MediaFormat in a later change, this change can
  be reverted.

Issue: #6601
PiperOrigin-RevId: 281264149

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

@@ -512,6 +512,7 @@ public class MediaCodecAudioRenderer extends MediaCodecRenderer implements Media
     return Util.areEqual(oldFormat.sampleMimeType, newFormat.sampleMimeType)
         && oldFormat.channelCount == newFormat.channelCount
         && oldFormat.sampleRate == newFormat.sampleRate
+        && oldFormat.pcmEncoding == newFormat.pcmEncoding
         && oldFormat.initializationDataEquals(newFormat)
         && !MimeTypes.AUDIO_OPUS.equals(oldFormat.sampleMimeType);
   }