These are aliases for cricket::Codec. Also remove internal usage Bug: b/42225532 Change-Id: I220b95260dc942368cb6280432a058159eec8700 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/349321 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42194}