[ADI][8/N] per-user global verification policy

+ global verification policy can be different per user
+ log initial verification policy per session for debugging

FLAG: android.content.pm.verification_service

BUG: 360129657
Test: atest CtsPackageManagerTestCases:VerifierServiceTest

Reverted changes: /q/submissionid:30469933-revert_verification_service_main

Merged-In: I1ca0d08ddcc05569e887ef0ccb86d9b3f0bf0a1b
Change-Id: I1ca0d08ddcc05569e887ef0ccb86d9b3f0bf0a1b