This will be useful in future socket handover tests. Bug: webrtc:13154 Change-Id: Ia789ae971edd9d2832be088f2f8f7dd50c9ce52d Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231222 Reviewed-by: Victor Boivie <boivie@webrtc.org> Commit-Queue: Sergey Sukhanov <sergeysu@webrtc.org> Cr-Commit-Position: refs/heads/main@{#34931}