This allows use of arbitrarily-named codecs. Bug: None Change-Id: If7ecbfe3ae8f08f8ebfb224219ef9192a4a0b884 Reviewed-on: https://webrtc-review.googlesource.com/69681 Commit-Queue: Kári Helgason <kthelgason@webrtc.org> Reviewed-by: Rasmus Brandt <brandtr@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22860}