This CL moves the logic where the ViEEncoder pause if the pacer is full to the BitrateController. If the queue is full, the controller reports a bitrate of zero to Call (and BitrateAllocator) BUG=webrtc:5687 Review-Url: https://codereview.webrtc.org/1917793002 Cr-Commit-Position: refs/heads/master@{#12620}