Add MediaPlayer::getAudioStreamType.

Change-Id: I9cd8a718d2873543609aa651fd85749478f4f89f
diff --git a/media/libmedia/mediaplayer.cpp b/media/libmedia/mediaplayer.cpp
index d94c7c5..0be01a9 100644
--- a/media/libmedia/mediaplayer.cpp
+++ b/media/libmedia/mediaplayer.cpp
@@ -531,6 +531,14 @@
     return OK;
 }
 
+status_t MediaPlayer::getAudioStreamType(audio_stream_type_t *type)
+{
+    ALOGV("getAudioStreamType");
+    Mutex::Autolock _l(mLock);
+    *type = mStreamType;
+    return OK;
+}
+
 status_t MediaPlayer::setLooping(int loop)
 {
     ALOGV("MediaPlayer::setLooping");