This includes changes that change the order of codecs. It is preparatory to doing late assignment of video PTs. Bug: webrtc:360058654 Change-Id: Id5ddaf94d4b9557c0502a373e42635108d8fdf26 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/366400 Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43489}