am 532d2ac5: Merge "Only check the codec specific data when the output buffer contains kKeyIsCodecConfig in MP4 writer" into gingerbread

Merge commit '532d2ac5d5c06c3938c4999238d1051207bfe53c' into gingerbread-plus-aosp

* commit '532d2ac5d5c06c3938c4999238d1051207bfe53c':
  Only check the codec specific data when the output buffer contains kKeyIsCodecConfig in MP4 writer