QuotaController tracking only jobs started in bg.

We don't want to penalize apps for starting jobs while in the foreground
so QuotaController now only tracks jobs that started while the uid
wasn't active.

Bug: 117846754
Bug: 111423978
Test: atest com.android.server.job.controllers.QuotaControllerTest
Change-Id: Icc36a361a466571af75b74c0cd9c976c6c321b43