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/libmedia/include/mediaplayer.h b/media/libmedia/include/mediaplayer.h
index 18d69a7..623c374 100644
--- a/media/libmedia/include/mediaplayer.h
+++ b/media/libmedia/include/mediaplayer.h
@@ -133,6 +133,10 @@
     MEDIA_INFO_NOT_SEEKABLE = 801,
     // New media metadata is available.
     MEDIA_INFO_METADATA_UPDATE = 802,
+    // Audio can not be played.
+    MEDIA_INFO_PLAY_AUDIO_ERROR = 804,
+    // Video can not be played.
+    MEDIA_INFO_PLAY_VIDEO_ERROR = 805,
 
     //9xx
     MEDIA_INFO_TIMED_TEXT_ERROR = 900,