Simulate installer denying USE_FULL_SCREEN_INTENT unless allowlisted.

Pre-installed (i.e. system) apps are automatically considered
allowlisted.

Note that the change can't be made in PackageInstaller because we need
to know the package name but that's unavailable before the install.

Bug: 277104139
Test: manual
Change-Id: I6c48483cf1681313203269025fbab51f54b8cbf0