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

* commit '7e2daacb376a3ecf45cc7f9723e181e238e0822e':
  stagefright: MPEG4Extractor: allow 'hdlr' box before first track