GitLab

Add OnSnapshotsDisabled() processing to ArcDataSnapshotdManager.
All available snapshots must be removed and ongoing flows stopped
(except when MGS is already running with loaded snapshot) once the
feature is switched off.

BUG=b:170187468
TEST=components_unittests

Change-Id: I9f2c64817589639407f4294f04b077fea85aefea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2558403
Commit-Queue: Polina Bondarenko <pbond@chromium.org>
Reviewed-by: David Roger <droger@chromium.org>
Reviewed-by: Oleksandr Peletskyi <peletskyi@chromium.org>
Auto-Submit: Polina Bondarenko <pbond@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835614}