Also make it possible to pause an already paused stream by making it a no-op. Change-Id: Id10f74a4c6464067ae63208162194f020c6470eb Bug: b/271542055 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/298202 Commit-Queue: Jeremy Leconte <jleconte@google.com> Reviewed-by: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/main@{#39620}