Add CTS tests for clearing compat overrides on release builds Those CTS tests verify that a package with the required permission can successfully clear overrides on release builds as long as those compat changes are marked as @Overridable. Bug: 183183372 Test: atest CtsAppCompatHostTestCases Change-Id: I0e9eba8b5b35aae910b9a6fa853a2c7f4946e1f4