Merge "stagefright: MPEG4Extractor: allow \'hdlr\' box before first track" into klp-dev am: b1a13d01dc am: 781cd4f37d am: 8565726f57 am: b44e95da77 am: 699e9b0749 am: 8e4f53159c am: 8fbf202f7b am: e20b0eb88c am: bbe22fe075 am: 7e2daacb37
am: 23ae8a79d8

* commit '23ae8a79d8cc629757e18baeaba1e7ddfaccec18':
  stagefright: MPEG4Extractor: allow 'hdlr' box before first track