MediaSync: fix message delay based on play time for pending audio frames.

Bug: 19666434
Change-Id: Ia9ad3858d4ddccf8aa476f2506785f1d76f90b32
diff --git a/media/jni/android_media_MediaSync.h b/media/jni/android_media_MediaSync.h
index 9e5de7e..cf81a72 100644
--- a/media/jni/android_media_MediaSync.h
+++ b/media/jni/android_media_MediaSync.h
@@ -41,6 +41,8 @@
 
     status_t setPlaybackRate(float rate);
 
+    status_t getPlayTimeForPendingAudioFrames(int64_t *outTimeUs);
+
     sp<const MediaClock> getMediaClock();
 
 protected: