I've added a basic AV1 impl to Chrome Remote Desktop and am looking into what is needed to test with I444 (Profile-1) in our platform. This CL adds a few helper functions, constants, and enums that can be used to configure the SDP with different AV1 profiles. More work is still needed but I wanted to get this in place first so I can build on it in the CRD host code. Change-Id: I1af9ebf31f833138e8c36e0c0a30e32289e7b58e Bug: chromium:1329660 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/264000 Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Joe Downing <joedow@google.com> Cr-Commit-Position: refs/heads/main@{#37182}