Separate unit and integration tests from AutofillValueTest 1. Move integration tests to CheckoutActivityTest. 2. Make AutofillValueTest be a unit test. Bug: 159304958 Test: atest android.autofillservice.cts.CheckoutActivityTest Test: atest android.autofillservice.cts.AutofillValueTest Change-Id: I48848dc1236161f481010dd78c3b9cbf5dd1faed