When deciding an app's standby bucket, check if the
app has its user control disabled by an IT admin. If so,
the app should be the exempted restricted bucket.
Bug: 272042183
Test: atest AppStandbyControllerTests
Change-Id: I4279dc37f0e17aedb1c2a87468478248443a253e
Merged-In: I4279dc37f0e17aedb1c2a87468478248443a253e
(cherry picked from commit 269fcb6873)