NuPlayer: notify client of playback error of individual track.

Test: mediaplayer doesn't send error notify to client when only one
track has error.
Bug: 24761723
Change-Id: Ie956f2c29483ac722a75bea86d649ce6d934a43d
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayer.h b/media/libmediaplayerservice/nuplayer/NuPlayer.h
index d3cb7c1..d542749 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayer.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayer.h
@@ -218,6 +218,8 @@
     bool mPrepared;
     bool mResetting;
     bool mSourceStarted;
+    bool mAudioDecoderError;
+    bool mVideoDecoderError;
 
     // Actual pause state, either as requested by client or due to buffering.
     bool mPaused;