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

Change-Id: I7678f9434aba511303278af7a4293d7b44f591ee