Fixing recovery related tests

Tests needs to be updated in according with various refactorings done
for crashrecovery module.

Test: atest PackageWatchdogTest;
Test: atest RollbackPackageHealthObserverTest
Bug: 368397616
Flag: android.crashrecovery.flags.refactor_crashrecovery
Change-Id: I674d91b20951c3dcd2719a605103765d0519631d