experimental support for fragmented mp4 playback in nuplayer

cherry picked from change 170999

Change-Id: I407775f0290154ad4961134839a15c9f296424c0
diff --git a/media/libmediaplayerservice/nuplayer/GenericSource.h b/media/libmediaplayerservice/nuplayer/GenericSource.h
index aaa5876..e50b855 100644
--- a/media/libmediaplayerservice/nuplayer/GenericSource.h
+++ b/media/libmediaplayerservice/nuplayer/GenericSource.h
@@ -43,7 +43,6 @@
 
     virtual status_t feedMoreTSData();
 
-    virtual sp<MetaData> getFormat(bool audio);
     virtual status_t dequeueAccessUnit(bool audio, sp<ABuffer> *accessUnit);
 
     virtual status_t getDuration(int64_t *durationUs);
@@ -53,6 +52,8 @@
 protected:
     virtual ~GenericSource();
 
+    virtual sp<MetaData> getFormatMeta(bool audio);
+
 private:
     struct Track {
         sp<MediaSource> mSource;