This change increases the number of scenarios where the RTT would be
available to `ChannelReceive`. That's the case since
`ModuleRtpRtcpImpl2::RTT()` falls back on the DLRR-based method when
the report blocks based method is unavailable - i.e., when there is
no audio sender.
Bug: webrtc:10739
Change-Id: Ie2451c739ab5bcfbe7844ee852bb12a97dab2ca4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/274581
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38048}