Disable Flexibility Controller for Android Auto

Added boolean to controller that tracks if a device supports flexible
job constraints. If a false, jobs will not be tracked and the
flexibility constraint will always be satisfied. Android Auto devices
are currently the only devices that don't support flexible job
constraints.

Bug: 238887961

Test: atest frameworks/base/services/tests/mockingservicestests/src/com/android/server/job
Test: atest frameworks/base/services/tests/servicestests/src/com/android/server/job
Test: atest CtsJobSchedulerTestCases
Change-Id: Iacdf25f58525d308f55d77ca7d175ec41192119c