Altering permission flag to be visible to other modules

This is needed for a follow-up change which adds newly created XR perception permissions to the runtime permission mapping in PermissionController. See steps at go/new-permission#next-steps-depending-on-protection-level.

Bug: 364416355
Flag: android.xr.xr_manifest_entries
Change-Id: I958ecfe16219c00846a7c73fc25ba28781b744b8
Test: Built locally (no code changes in this)