57c2fff361
Currently, parameters are periodically updated, but the TargetBitrate message is only sent if a new bitrate is set. It should be sent periodically to indicate the signaled bitrate is valid and to prevent stale values due to loss of RTCP packets. BUG=webrtc:6897 Review-Url: https://codereview.webrtc.org/2616393003 Cr-Commit-Position: refs/heads/master@{#16096}