This is a follow up of https://webrtc-review.googlesource.com/c/src/+/43201. Issue 43201 didn't do the job properly. 1. The audio rtcp report interval is not properly hooked up. 2. We don't need to propagate audio rtcp interval into video send stream or vice versa. 3. We don't need to propagate rtcp report interval to any receiving streams. Bug: webrtc:8789 Change-Id: I1f637d6e5173608564ef0702d7eda6fc93b3200f Reviewed-on: https://webrtc-review.googlesource.com/c/110105 Reviewed-by: Erik Språng <sprang@webrtc.org> Reviewed-by: Magnus Flodman <mflodman@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Jiawei Ou <ouj@fb.com> Cr-Commit-Position: refs/heads/master@{#25610}