Update notes for submitted changes

* audio: Add support for non-pcm VOIP vocoders
* audio: Add support for tunnel mode recording
* libstagefright: print seek statistics even when paused
* libstagefright: In thumbnail mode set EOS on first frame
* libstagefright: enable smoothstreaming in OMXCodec
* libstagefright: enable smoothstreaming in ACodec
* Audio: Enable QCOM's HW AAC encoder conditionally
* libstagefright: Fix for FPS drop issue during A-V playback.
* frameworks/av: Set arbitrary mode to false by default