am a0488341: am 532d2ac5: Merge "Only check the codec specific data when the output buffer contains kKeyIsCodecConfig in MP4 writer" into gingerbread

Merge commit 'a04883412ec1a5dac3e83c3fd3c335ab9579a990'

* commit 'a04883412ec1a5dac3e83c3fd3c335ab9579a990':
  Only check the codec specific data when the output buffer contains kKeyIsCodecConfig in MP4 writer