am 7d973514: Merge change 27449 into eclair

Merge commit '7d9735142f75c3bf30b420fdd006dc356f32fede' into eclair-plus-aosp

* commit '7d9735142f75c3bf30b420fdd006dc356f32fede':
  Always consider m4a files as audio, even when they contain a video track.