Fix integer overflow in mediadrmserver am: eb21712f81 am: 5250bc1bec am: d1a854a073 am: 7a22df06c3 am: 4e339cbca4 am: 1248e62082 am: fdfb9d206d
am: a64aff4551

Change-Id: I7172b5b48dc4266acc2f405e7bef0aaf86c1f37a