Handle corner cases in "Alarms and Reminders" page

There are few corner cases and new updates that need to be incorporated:
1. Apps that declare USE_EXACT_ALARM, do not need SCHEDULE_EXACT_ALARM.
   So these should be filtered out, regardless of whather they declared
   the latter.
2. Apps that are in the power allowlist do not need either of the
   permission, and so these should be filtered out as well.

In either case, if the user somehow ends up in the app detail page for
this setting, the switch should get disabled based on existing logic.

Test: make -j RunSettingsRoboTests
Test: Manually by UI inspection:
Settings -> Apps -> Special App access -> Alarms and Reminders
or by running:
adb shell am start -a android.settings.REQUEST_SCHEDULE_EXACT_ALARM

Bug: 232460265
Change-Id: I5aeab49f95260218878bc36f5a4d73a49e5082e4