[5/N] Use synchronous interface for report* methods

We still want to be able to throw an exception to the client if the
reporting has failed (e.g., if the session has already been finished).
Therefore, changing these methods to be synchronous.

FLAG: android.content.pm.verification_service

BUG: 360129657

Test: atest CtsPackageManagerTestCases:VerifierServiceTest

Change-Id: I1f91277cb4db669e5bf3a59faf72b38c21737e4d