NuPlayerRenderer: allow video to update media clock when audio reaches EOS.

Bug: 22769545

Change-Id: I417f00a16bd7859a09eeb44d57ea426cc35dc4a4
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.h b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.h
index 3e65649..58bf121 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerRenderer.h
@@ -176,7 +176,8 @@
     int32_t mVideoRenderingStartGeneration;
     int32_t mAudioRenderingStartGeneration;
 
-    int64_t mLastPositionUpdateUs;
+    // the media timestamp of last audio sample right before EOS.
+    int64_t mLastAudioMediaTimeUs;
 
     int32_t mAudioOffloadPauseTimeoutGeneration;
     bool mAudioTornDown;