Replaces both BitrateConstraintsMask and PeerConnectionInterface::BitrateParameters. The latter is kept temporarily for backwards compatibility. Bug: None Change-Id: Ibe1d043f2a76e56ff67809774e9c0f5e0ec9e00f Reviewed-on: https://webrtc-review.googlesource.com/74020 Commit-Queue: Niels Moller <nisse@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Reviewed-by: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#23148}