[Uno-D] Accepting signin interception sets ChromeSignin setting to always signin

Bug: b:345737884
Change-Id: Ib93005fda83e3de0b49fabc02ac13236f29c8a9d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5613298


Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: David Roger <droger@chromium.org>
Commit-Queue: Ryan Sultanem <rsult@google.com>
Cr-Commit-Position: refs/heads/main@{#1312766}