Allow deviceProvisioningPackage to start foreground service from the

background.

Even when the deviceProvisioningPackage is background-restricted aka in
the forced-app-standby mode.

Bug: 286115374
Bug: 279767668
Test: atest cts/tests/app/src/android/app/cts/ActivityManagerFgsBgStartTest.java

Change-Id: I114d168943fa721375bacd0762d9b66fec6f6a86