[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

Change-Id: I309a4858ad2b0a21a05a5e09d3598dad82f21f7c
9 files changed