PackageManagerTest: match FACTORY_ONLY apex * It should be fine in PackageManagerTest to only care about pre-installed shim apex. * Scenarios using updated shim apex are covered in StagedInstallTest. * This makes PackageManagerTest robust against other tests failing to clean up state properly. Test: install v2 of shim apex and run atest PackageManagerTest Change-Id: If5b08abf75d8843b2033c194328c1fb204b00325