GitLab

Stop honor the policy on the lock screen.
Also tweaked LoginScreen*Policy tests a bit

Fixed: 1071012
Bug: 1067260, 1071010, 1071779
Change-Id: Icaa5fd108b66dbe22fde738f000b3eff49236347
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2149357
Commit-Queue: Roman Sorokin [CET] <rsorokin@chromium.org>
Reviewed-by: Alexander Alekseev <alemate@chromium.org>
Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760016}