[ADI][UserConfirmation][3/4] Add unit tests for ConfirmVerification dialogs

Tests if a combination of VerificationPolicy and
VerificationFailureReason produces the correct type of dialog

Bug: 360130528
Test: atest PackageInstallerAppUnitTests
Flag: android.content.pm.verification_service
Merged-In: If9c9bcaa1e3c2049191b6ff4508592143baa6cdd
Change-Id: If9c9bcaa1e3c2049191b6ff4508592143baa6cdd