Ensure apps can schedule/start EJs when temp allowlisted.

1. Make sure apps that have run out of EJ quota are able to schedule and
   start EJs when they're placed on the temp allowlist or are in the
   grace period.
2. Add additional tests.

Bug: 171305774
Test: atest FrameworksMockingServicesTest:QuotaControllerTest
Change-Id: I1e484672f2d38c8572bc96770a21fffce75f91ba