Use audio_session_t consistently

Bug: 27562099
Change-Id: I328d8226191386b163f2ace41233607294c50dcd
diff --git a/include/media/IMediaPlayerService.h b/include/media/IMediaPlayerService.h
index 99ca6f0..e5d3cda 100644
--- a/include/media/IMediaPlayerService.h
+++ b/include/media/IMediaPlayerService.h
@@ -49,8 +49,8 @@
 
     virtual sp<IMediaRecorder> createMediaRecorder(const String16 &opPackageName) = 0;
     virtual sp<IMediaMetadataRetriever> createMetadataRetriever() = 0;
-    virtual sp<IMediaPlayer> create(const sp<IMediaPlayerClient>& client, int audioSessionId = 0)
-            = 0;
+    virtual sp<IMediaPlayer> create(const sp<IMediaPlayerClient>& client,
+            audio_session_t audioSessionId = AUDIO_SESSION_ALLOCATE) = 0;
     virtual sp<IOMX>            getOMX() = 0;
     virtual sp<ICrypto>         makeCrypto() = 0;
     virtual sp<IDrm>            makeDrm() = 0;