which can happen if the remote end reuses a mid. BUG=webrtc:15471 Change-Id: I38da7dced712400002bc61d616e481a1255aa896 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/319460 Reviewed-by: Florent Castelli <orphis@webrtc.org> Commit-Queue: Philipp Hancke <phancke@microsoft.com> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40776}