VideoBitrateAllocation is instead reported through the EncoderSink. Enable VideoBitrateAllocation reporting from WebRtcVideoChannel::AddSendStream in preparation for using the extension RtpVideoLayersAllocationExtension instead of RTCP XR. Bug: webrtc:12000 Change-Id: I5ea8e4f237a1c4e84a89cbfd97ac4353d4c2984f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/186940 Commit-Queue: Per Kjellander <perkj@webrtc.org> Reviewed-by: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32347}