Merge "Process all messages of TestLooper after each test" into rvc-dev am:...

    public void SysuiTeardown() {

        InstrumentationRegistry.registerInstance(mRealInstrumentation,

                InstrumentationRegistry.getArguments());

        // Reset the assert's testable looper to null.

        if (TestableLooper.get(this) != null) {

            TestableLooper.get(this).processAllMessages();

        }

        disallowTestableLooperAsMainThread();

        SystemUIFactory.cleanup();

    }