BufferingSettings: define internal BufferingSettings API.

Test: compiles
Bug: 32524218
Change-Id: I9a95b2fdfa497179305e031aac69e5a987614dbb
diff --git a/media/libmediaplayerservice/MediaPlayerService.h b/media/libmediaplayerservice/MediaPlayerService.h
index a4ea37f..8a6ada0 100644
--- a/media/libmediaplayerservice/MediaPlayerService.h
+++ b/media/libmediaplayerservice/MediaPlayerService.h
@@ -288,6 +288,9 @@
         virtual void            disconnect();
         virtual status_t        setVideoSurfaceTexture(
                                         const sp<IGraphicBufferProducer>& bufferProducer);
+        virtual status_t        setBufferingSettings(const BufferingSettings& buffering) override;
+        virtual status_t        getDefaultBufferingSettings(
+                                        BufferingSettings* buffering /* nonnull */) override;
         virtual status_t        prepareAsync();
         virtual status_t        start();
         virtual status_t        stop();