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 'cc14a8393b92cd1ed6cba74829396045605ab211' into gingerbread-plus-aosp

* commit 'cc14a8393b92cd1ed6cba74829396045605ab211':
  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.