Merge "DO NOT MERGE: MPEG4Extractor: ensure returned status is checked." into mnc-dev am: 80059d44c4 am: 72840f2216 am: 9e9987c46d am: 9583ca702a  -s ours am: acf3c39437
am: d1ce7bb7c8

Change-Id: Ib2d891e80b63e42c76ae037f3d41bc5eb4ab3cb5