Update notes for submitted changes

* keymaster: add flags indicating feature support
Update notes for submitted changes

* usbaudio: allow compiling for 64-bit
* audio_remote_submix: allow compiling for 64-bit
* audio: allow compiling for 64-bit
Update notes for submitted changes

* gralloc: Add asynchronous lock/unlock API
Update notes for submitted changes

* Revert "gralloc: Add asynchronous lock/unlock API"
Update notes for submitted changes

* gralloc: Add asynchronous lock/unlock API