[Android][AppCompat]AppCompat22.2.0でv7.NotificationCompatが追加されてMediaStyleが使えるようになっていた ref: http://qiita.com/wasnot/items/1f687197f931c37cf496

file0.java

new NotificationCompat.Builder(this).setStyle(new Notification.MediaStyle()
         .setMediaSession(mySession))

file1.java

Notification noti = new NotificationCompat.Builder()
     .setSmallIcon(R.drawable.ic_stat_player)
     .setContentTitle("Track title")
     .setContentText("Artist - Album")
     .setLargeIcon(albumArtBitmap))
     .setStyle(new NotificationCompat.MediaStyle()
         .setMediaSession(mySession))
     .build();