OP_SYSTEM_EXEMPT_FROM_POWER_RESTRICTIONS details:
* An app with this appop will be made exempt from all
power restrictions, including app standby and doze.
* In addition, the app will be able to start fgs from
the bg, and the user will not be able to stop fgs
run by the app.
Changes:
* Implement the OP_SYSTEM_EXEMPT_FROM_POWER_RESTRICTIONS
Bug: 246330879
Test: atest PowerAllowlistBackendTest
Manual testing:
- Give OP_SYSTEM_EXEMPT_FROM_POWER_RESTRICTIONS appop to TestDPC app
- Verify the app can start fg services from the bg
- Verify fgs started by the app cannot be stopped
- Verify the app cannot be put into background restricted via Settings
Change-Id: If9e76076c59195f1e6e5f3eee3c8e7a0c754d8de
2747dc6e8c