A number of unit tests assume that payload types will be assigned without generating an offer. These are flushed out by running tests with the --force_fieldtrials=WebRTC-PayloadTypesInTransport argument. Bug: webrtc:360058654 Change-Id: I17cd5bfa275904a9630068190b1cd246e9ce8741 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/362500 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43127}