Enforce DevicePolicyManager.setUserControlDisabledPackages in AppStandbyController

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
(cherry picked from commit 269fcb68)
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:3dbab873d6d8f78c4d498a575ad37fd0dc20efbe)
Merged-In: I4279dc37f0e17aedb1c2a87468478248443a253e
Change-Id: I4279dc37f0e17aedb1c2a87468478248443a253e