For example, zero rtt may be reported to:
BitrateControllerImpl::OnReceivedRtcpReceiverReport:
- SendSideBandwidthEstimation::UpdateReceiverBlock
- SendSideBandwidthEstimation::UpdateUmaStats
BitrateAllocator::OnNetworkChanged:
- ProtectionBitrateCalculator::SetTargetRates
Re-add check that was removed in https://codereview.webrtc.org/2422063002.
BUG=webrtc:6692
Review-Url: https://codereview.webrtc.org/2552883010
Cr-Commit-Position: refs/heads/master@{#15486}