Removing unused flags.

We thought about batching based on constraints when JobScheduler was
first introduced (in Lollipop) but immediately disabled that behavior.
We haven't used the flags since then, and now that we're batching all
jobs that aren't in the ACTIVE bucket, these extra flags are not needed.

Bug: 141645789
Test: atest FrameworksMockingServicesTests:JobSchedulerServiceTest
Test: atest CtsIncidentHostTestCases:JobSchedulerIncidentTest
Change-Id: I8df75007a0c8124ea35c7917a5413310fbdeff79