Delaying jobs while coming out of doze

Foreground uids can run their jobs immediately given other constraints
are met. Other jobs will be delayed by 3 seconds when coming out of
doze to ensure imminent user tasks like screen-on can use resources.
Also added an API to allow apps to indicate their job is important to
the user enough that it is allowed to run when the app is in the
foreground or on the temp whitelist regardless of the dozing state of
the device.

Test: cts-tradefed run singleCommand cts-dev -m JobScheduler -t \
android.jobscheduler.cts.DeviceIdleJobsTest

Bug: 64291952
Bug: 64071030

Change-Id: Id52cb4386e683d4f8297e873b3a68c573e5be743