Move device idle logic into a job StateController

Move most of device idle (doze) logic from JobSchedulerService
to DeviceIdleJobsController.

Allow whitelisted apps to run during device idle by adding
a new constraint DEVICE_NOT_DOZING. Using the word DOZE to
disambiguate from IDLE because the latter is used to mean
that the job wants to run in idle-maintenance period.

Bug: 26851107

Change-Id: I97f5286bd4d5ca18fbc46c2037c310fd369e18bf