Treat allowlists differently for flattened apex

On devices which use flattened APEX, treat the allowlists as part of the
system image.

Test: m # lunch wembley_2GB-userdebug
Bug: 221862988
Change-Id: I1971a686aa111b396f9e694a74be70d758078423
Merged-In: I1971a686aa111b396f9e694a74be70d758078423
1 file changed