Fix END_OF_STREAM transformer timestamp matching previous.

This cause the muxer to fail to stop on older devices/API levels.

#minor-release

PiperOrigin-RevId: 407309028

RELEASENOTES.md

@@ -90,6 +90,9 @@
     *   Rename
         `MediaSessionConnector.QueueNavigator#onCurrentWindowIndexChanged` to
         `onCurrentMediaItemIndexChanged`.
+*   Transformer:
+    *   Avoid sending a duplicate timestamp to the encoder with the end of
+        stream buffer.
 *   Remove deprecated symbols:
     *   Remove `Renderer.VIDEO_SCALING_MODE_*` constants. Use identically named
         constants in `C` instead.

library/transformer/src/main/java/com/google/android/exoplayer2/transformer/TransformerAudioRenderer.java

@@ -316,6 +316,7 @@ private void feedEncoder(MediaCodecAdapterWrapper encoder, ByteBuffer inputBuffe
 
   private void queueEndOfStreamToEncoder(MediaCodecAdapterWrapper encoder) {
     checkState(checkNotNull(encoderInputBuffer.data).position() == 0);
+    encoderInputBuffer.timeUs = nextEncoderInputBufferTimeUs;
     encoderInputBuffer.addFlag(C.BUFFER_FLAG_END_OF_STREAM);
     encoderInputBuffer.flip();
     // Queuing EOS should only occur with an empty buffer.