MediaPlayer2: support start position of data source

Test: cts
Bug: 112549021
Change-Id: I4062fab27aff101223cfb3924841c8e7c3afa6ce
diff --git a/media/libmediaplayer2/nuplayer2/HTTPLiveSource2.h b/media/libmediaplayer2/nuplayer2/HTTPLiveSource2.h
index 97d3653..8fc71e2 100644
--- a/media/libmediaplayer2/nuplayer2/HTTPLiveSource2.h
+++ b/media/libmediaplayer2/nuplayer2/HTTPLiveSource2.h
@@ -38,7 +38,7 @@
             BufferingSettings* buffering /* nonnull */) override;
     virtual status_t setBufferingSettings(const BufferingSettings& buffering) override;
 
-    virtual void prepareAsync();
+    virtual void prepareAsync(int64_t startTimeUs);
     virtual void start();
 
     virtual status_t dequeueAccessUnit(bool audio, sp<ABuffer> *accessUnit);