stagefright: MP4Extractor: allow 10% overhead on default sample size am: a27317ab45 am: 268c480035 am: 87ce4202df am: d8c0785a36 am: fed97f38c2 am: 44f4c4d388 am: bdba8a6e12 am: de67feb70e am: 4723392015 am: c071a00dcf am: 7555e69a7e
am: 181e39beba

Change-Id: I74f7344d6ec0db0443d492b0c65e9f5e25dd203e