There is one RTCP receiver per receive stream. Therefore, only handle a
received CongestionControlFeedback in the RTCP receiver corresponding to
the first SSRC in the report.
Bug: webrtc:42225697
Change-Id: I9bc0009cb6840cddeaca25f39c597bc2c13a3604
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/372280
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Commit-Queue: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#43613}
fab4992f3d