Fix Robolectric tests that use JobScheduler

In ag/8881405 registering JobScheduler with SystemRegistryService has moved int JobSchedulerFrameworkInitializer. Make sure that class is loaded before the tests are run.

Bug: 138840929
Test: atest RunBackupFrameworksServicesRoboTest
Change-Id: Idacab9f8597b57df5b61a5c6619090a242a76264
7 files changed