JobScheduler: Update the evaluation for the media backup exemption policy

Jobs from the cloud media package will continue to be evaluated using
the legacy policy. Jobs not exempted by the legacy policy will be
re-evaluated with the new policy.

Bug: 436531976
Test: atest FrameworksMockingServicesTests:com.android.server.job.controllers.JobStatusTest
Flag: com.android.server.job.update_media_backup_exemption_policy
Change-Id: Idab22110a466fbc40d3180f29ca1ba587e6b10b8