Work around GIDs not applied to APK-in-APEX permissions on first boot.

This causes a small behavioral change that prevents misbehaving normal
apps from being installed, so it's only checked in here to unblock V
feature development on AOSP main but should't be actually shipped
(that's why it has a `Merged-In`).

See also ag/26216413 and ag/26228284.

Bug: 325137277
Bug: 322197421
Test: manually check the GIDs in dumpsys permissionmgr after clean flash
Merged-In: Ied24c45734e7c57ce8ed0d015121675bfcbae54f
Change-Id: If0d63e382cd8b8d088753ce16ac05c315032ec85