Fix initialization of AudioTrack related output parameters

media/base/android/audio_media_codec_decoder.cc

Index: media/base/android/audio_media_codec_decoder.cc
diff --git a/media/base/android/audio_media_codec_decoder.cc b/media/base/android/audio_media_codec_decoder.cc
index 299a70a48c656f5c0469f19fa2c1d5c267b117b3..4533c6cbd8eb0f5df92eff19a09067f6c14d8569 100644
--- a/media/base/android/audio_media_codec_decoder.cc
+++ b/media/base/android/audio_media_codec_decoder.cc
@@ -159,6 +159,12 @@ MediaCodecDecoder::ConfigStatus AudioMediaCodecDecoder::ConfigureInternal(
 
   DVLOG(0) << class_name() << "::" << __FUNCTION__ << " succeeded";
 
+  // ConfigureAndStart() creates AudioTrack with sampling rate and channel count
+  // from |configs_|. Keep |output_...| in sync to detect the changes that might
+  // come with OnOutputFormatChanged().
+  output_sampling_rate_ = configs_.audio_sampling_rate;
+  output_num_channels_ = configs_.audio_channels;
+
   SetVolumeInternal();
 
   frame_count_ = 0;