Always allow devicelockcontroller to schedule jobs/alarms in background

Bug: 290924390
Test: builld successfully
Test: flash aosp_mokey_go32-userdebug and go to settings,
      battery saving mode is fixed at unrestricted for dlc
Change-Id: I7a5be87b89b4f31e10e0b9c0d5fca21ed40f9f92