This change includes multiple things:

1. Add a test API for GTS tests to recover the saved rules after the test.
2. Fix a bug where we incorrectly hashed the certificate hashes again.
3. Do not skip the integrity verification for rule providers if one settings is
enabled. This is because otherwise installs from GTS test will not be checked.

Bug: 145674131
Test: manual run of GTS test.
Test: atest AppIntegrityManagerServiceImplTest
Change-Id: Ia61265b1e9d20d310b695ad20982da80b5d659ba