Don't allowlist on BOOT_COMPLETED for unstop

When coming out of force-stop, don't allowlist the app
to start FGS, as this isn't the use case for allowing
FGS starts on boot. If the app is being manually
launched after force-stop (most likely scenario),
allowlisting isn't needed.

This fixes the expectation in the CtsAppTestCases that
the app doesn't have FGS permission when bound by
another app in a background state, etc.

Fixes: 319092316
Test: atest CtsAppTestCases:ActivityManagerFgsBgStartTest
Change-Id: I784f4a52a823fe82d91d43266991e1aac81c9d17