Add support of audio offloading for NuPlayer.

Change-Id: Ic83973339fb46a83b48382e6097925f45d200867
diff --git a/media/libmediaplayerservice/nuplayer/NuPlayerSource.h b/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
index f5a1d6d..632c4a6 100644
--- a/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
+++ b/media/libmediaplayerservice/nuplayer/NuPlayerSource.h
@@ -64,6 +64,7 @@
     virtual status_t feedMoreTSData() = 0;
 
     virtual sp<AMessage> getFormat(bool audio);
+    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
 
     virtual status_t dequeueAccessUnit(
             bool audio, sp<ABuffer> *accessUnit) = 0;
@@ -97,8 +98,6 @@
 
     virtual void onMessageReceived(const sp<AMessage> &msg);
 
-    virtual sp<MetaData> getFormatMeta(bool /* audio */) { return NULL; }
-
     sp<AMessage> dupNotify() const { return mNotify->dup(); }
 
     void notifyFlagsChanged(uint32_t flags);