NuPlayer: Add audio sink buffer configuration

Property media.stagefright.audio.sink (in milliseconds)
Also change the default buffer size for PCM playback to 500 ms.

Bug: 21198655
Change-Id: I5781288f59bf08fbecd9263a26c919570b58be0f
diff --git a/include/media/MediaPlayerInterface.h b/include/media/MediaPlayerInterface.h
index 46f900e..de82554 100644
--- a/include/media/MediaPlayerInterface.h
+++ b/include/media/MediaPlayerInterface.h
@@ -114,7 +114,8 @@
                 void *cookie = NULL,
                 audio_output_flags_t flags = AUDIO_OUTPUT_FLAG_NONE,
                 const audio_offload_info_t *offloadInfo = NULL,
-                bool doNotReconnect = false) = 0;
+                bool doNotReconnect = false,
+                uint32_t suggestedFrameCount = 0) = 0;
 
         virtual status_t    start() = 0;