update metrics for mediaplayer

rework for a better guarantee of what is always present
in return value for android.media.MediaPlayer.getMetrics()

Bug: 36355865
Test: ran cts "android.media.cts.MediaPlayerTest"
Change-Id: Ieb6d14298e676fff7152dea5f7a9a66f7f7476a4
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
index 082f71a..c5ddcb0 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerDriver.h
@@ -137,7 +137,7 @@
     bool mLooping;
     bool mAutoLoop;
 
-    void finalizeMetrics(const char *where);
+    void updateMetrics(const char *where);
     void logMetrics(const char *where);
 
     status_t prepare_l();