Standardizing affordability check.

Put the affordability check in one place to make future changes easier.
Also combine affordability state updating.

Bug: 158300259
Test: Spot check dumpsys of tare, jobscheduler, and alarmmanager
Test: atest frameworks/base/services/tests/mockingservicestests/src/com/android/server/tare
Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/tare
Change-Id: I546c56e1003cd79035800d203e7978ff32e55e9d