Allow jobs to bypass blocked reason APP_BACKGROUND

All jobs should be allowed to bypass the blocked reason app_background.
Once the job starts running, NPMS will unblock this app.

Test: atest CtsJobSchedulerTestCases:\
JobThrottlingTest#testJobsInRestrictedBucket_WithRequiredNetwork

Bug: 330742301
Change-Id: Iab652a45a713392a81fe351a4a63cb95c452728d