Merge "stagefright: MPEG4Extractor: allow \'hdlr\' box before first track" into klp-dev am: b1a13d01dc am: 781cd4f37d
am: 8565726f57

* commit '8565726f5775a6db97a394aa18a1f6b0e1ce69b7':
  stagefright: MPEG4Extractor: allow 'hdlr' box before first track