Controlled by a field trial, P2PTransportChannel can now use an active ICE controller instead of a legacy ICE controller.
P2PTransportChannel unit tests need non-trivial changes to exercise the refactored code path, so the testing changes are added in a follow-up CL.
Bug: webrtc:14367, webrtc:14131
Change-Id: I00d4930a5692c7d6d331ea9d6c2a2199304e363c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/274701
Commit-Queue: Sameer Vijaykar <samvi@google.com>
Reviewed-by: Jonas Oreland <jonaso@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#38114}
