Use AudioTrack::event_type not int in callback

Change-Id: I09ff321f9457c0a9ee58e59bee38ed53799e494b
diff --git a/libvideoeditor/lvpp/AudioPlayerBase.h b/libvideoeditor/lvpp/AudioPlayerBase.h
index 31b9fa2..b82757b 100644
--- a/libvideoeditor/lvpp/AudioPlayerBase.h
+++ b/libvideoeditor/lvpp/AudioPlayerBase.h
@@ -18,6 +18,7 @@
 
 #define AUDIO_PLAYER_BASE_H_
 
+#include <media/AudioTrack.h>
 #include <media/MediaPlayerInterface.h>
 #include <media/stagefright/MediaBuffer.h>
 #include <media/stagefright/TimeSource.h>
@@ -95,8 +96,8 @@
     sp<MediaPlayerBase::AudioSink> mAudioSink;
     PreviewPlayerBase *mObserver;
 
-    static void AudioCallback(int event, void *user, void *info);
-    void AudioCallback(int event, void *info);
+    static void AudioCallback(AudioTrack::event_type event, void *user, void *info);
+    void AudioCallback(AudioTrack::event_type event, void *info);
 
     static size_t AudioSinkCallback(
             MediaPlayerBase::AudioSink *audioSink,