Update notes for submitted changes

* audioflinger: remove unecessary call to HAL
* libstagefright: Handle offload fallback for WAV content
* AudioFlinger: Modify flush handling for offload path
* audioflinger: Handle pause /resume in stopping state
* AudioFlinger: Offload track transition fix
* stagefright: Fix AV sync issue for cached audio sources
* libstagefright: Fix in AudioPlayer media time mapping
* audioflinger: Fix cleanup of asynccallback thread
* ACodec: Add video codec fallback logic