Implement ownership check in unified state determination flow

Removing initialization of DeviceOffHoursController from the constructor
used for tests. This class adds additional dependencies, such as a
sequential task runner, but EnrollmentStateFetcher tests do not need its
functionality.

Bug: b:265923216
Change-Id: I34ddbb05be68c8145f8629c6e515bf48277793e5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4378797
Reviewed-by: Igor <igorcov@chromium.org>
Reviewed-by: Hidehiko Abe <hidehiko@chromium.org>
Auto-Submit: Sergiy Belozorov <sergiyb@google.com>
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Commit-Queue: Sergiy Belozorov <sergiyb@google.com>
Cr-Commit-Position: refs/heads/main@{#1129842}