Intended to ease removal of VideoCodec::plType, separating video coding from transport. Bug: None Change-Id: I0764f2f714eab9ee4c3e55751819cd5915fb37b6 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/181075 Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31892}