Add support for AV1 to the MP4 muxer for MediaRecorde
It uses libgav1::ObuParser::GetAV1CodecConfigurationBox
for creating codecs_description of AV1.
It adds relevant unit tests and wpt.
Bug: 339217933
Change-Id: Ifaf44a33d7b076f87ba316dad59e07afa3b84ebf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5656274
Reviewed-by: Markus Handell handellm@google.com
Commit-Queue: Sunggook Chue sunggch@microsoft.com
Reviewed-by: Dale Curtis dalecurtis@chromium.org
Cr-Commit-Position: refs/heads/main@{#1321169}