Merge "DO NOT MERGE - m4v_h263: check header first before decoding a frame." into klp-dev am: da924b45e1 am: fdfad5899d am: f3383881ff  -s ours am: 486e62c5dd  -s ours am: 98a5397265
am: bb3d5445c9  -s ours

Change-Id: I7e16e397d557dd1ff164840fba537ad26627a401