Fix integer overflow in mediadrmserver am: eb21712f81 am: 5250bc1bec am: d1a854a073 am: 7a22df06c3 am: 4e339cbca4 am: 1248e62082 am: fdfb9d206d am: a64aff4551 am: 87e076681b
am: 8d214cd0b0

Change-Id: I95ccb284cfa1afc9997279c307bd13d2e2387a77