This patch enables an IceController to use Connection::ForgetLearnedState by returning it in a SwitchResult, that will cause P2PTransportChannel to call the method. BUG: webrtc:11463 Change-Id: I098bbbd2fb2961822b165770189ac0c2225d1cb0 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/176511 Commit-Queue: Jonas Oreland <jonaso@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/master@{#31458}