Update SAW exemption for user-initiated jobs.

Since apps with the SYSTEM_ALERT_WINDOW permission are no longer
allowed to start fgs from the background, update the exemption for
user-initiated jobs as well to keep the background start conditions
in sync. Apps will now need to also be showing a visible overlay
window in order to use this exemption.

Bug: 328795341
Test: atest UserInitiatedJobTest
Change-Id: I2cfb0229ab023b4389968a8135202db0cafca937