The newer format is byte aligned and thus faster to write and parse
It also more compact for the common target bitrate cases.
Bug: webrtc:12000
Change-Id: Id040ecb9e7d85799134a6e52f5d6d280b5161262
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/193860
Commit-Queue: Danil Chapovalov <danilchap@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32669}