am ff45709f: am cc14a839: Support a single format change at the beginning of audio playback. This way the AAC+ decoder may change its output format from what is originally encoded in the audio stream and we\'ll still play it back correctly.

Merge commit 'ff45709fbd1f24de1cf75ce9ce9ac8694ff1abbe'

* commit 'ff45709fbd1f24de1cf75ce9ce9ac8694ff1abbe':
  Support a single format change at the beginning of audio playback. This way the AAC+ decoder may change its output format from what is originally encoded in the audio stream and we'll still play it back correctly.