Added support for auxiliary audio effects to AudioTrack and MediaPlayer.

Added methods to AudioTrack and MediaPlayer java classes to enable use of
auxiliary audio effects. The effect can be attached and detached by specifying its
ID and the send level controlled.

Change-Id: Ie74ff54a453096a742688476f612ce355543b6f3
diff --git a/include/media/IMediaPlayer.h b/include/media/IMediaPlayer.h
index 2619691..af9a7ed 100644
--- a/include/media/IMediaPlayer.h
+++ b/include/media/IMediaPlayer.h
@@ -48,6 +48,8 @@
     virtual status_t        setVolume(float leftVolume, float rightVolume) = 0;
     virtual status_t        suspend() = 0;
     virtual status_t        resume() = 0;
+    virtual status_t        setAuxEffectSendLevel(float level) = 0;
+    virtual status_t        attachAuxEffect(int effectId) = 0;
 
     // Invoke a generic method on the player by using opaque parcels
     // for the request and reply.