merge_pr_46287

Disable real time reporting APIs for mode A/B traffic.

Also,

1. Added browser test for that.
2. Removed checking kRealTimeReporting flag in navigator_auction.cc when
   handling rtr fields, since these IDL fields are marked RunTimeEnabled,
   and these fields will just not show up when the flag is disabled.
3. Modify WPT expectations.

Bug: 337132755

Change-Id: I61f5c0ebb96c2177574dc02fd90d7269b00f407c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5539632
Commit-Queue: Qingxin Wu qingxinwu@google.com
Reviewed-by: mmenke mmenke@chromium.org
Reviewed-by: Mason Freed masonf@chromium.org
Cr-Commit-Position: refs/heads/main@{#1305132}