update offloaded audio track sampling rate

AudioPlayer must read the sampling rate from offloaded audio sinks
whenever a new time position is computed as the decoder can update
the sampling rate on the fly.

Change-Id: I997e5248cfd4017aeceb4e11689324ded2a5bc88
diff --git a/libvideoeditor/lvpp/VideoEditorPlayer.h b/libvideoeditor/lvpp/VideoEditorPlayer.h
index 5862c08..b8c1254 100755
--- a/libvideoeditor/lvpp/VideoEditorPlayer.h
+++ b/libvideoeditor/lvpp/VideoEditorPlayer.h
@@ -48,6 +48,7 @@
         virtual status_t        getPosition(uint32_t *position) const;
         virtual status_t        getFramesWritten(uint32_t*) const;
         virtual int             getSessionId() const;
+        virtual uint32_t        getSampleRate() const;
 
         virtual status_t        open(
                 uint32_t sampleRate, int channelCount, audio_channel_mask_t channelMask,