Under the combined network/worker thread project, tasks
are unnecessarily posted to the same thread. Avoid this
by posting only if invoked on a diffferent sequence.
TESTED=presubmit + local Meet calls.
Bug: webrtc:137439
Change-Id: I9befde0583b214ebe014617695c2eb9f047de8a0
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/295869
Commit-Queue: Markus Handell <handellm@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#39472}
c35a3f13c7