[RealTimeReporting part1] Add real time reporting opt-in.
Aution config changes for real time reporting opt-in.
Explainer: https://github.com/WICG/turtledove/blob/main/PA_real_time_monitoring.md
Bug: 337132755
Change-Id: Iada4b97f85b6245866b03553f1a2086031aba15e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5490151
Commit-Queue: Qingxin Wu qingxinwu@google.com
Reviewed-by: Caleb Raitto caraitto@chromium.org
Reviewed-by: Dmitry Gozman dgozman@chromium.org
Reviewed-by: Ken Buchanan kenrb@chromium.org
Cr-Commit-Position: refs/heads/main@{#1295442}