@Before
    public void setUp() {
        mCalculator = new Calculator();
    }
Constructor that takes in the values specified in
{@link CalculatorAddParameterizedTest#data()}. The values need to be saved to fields in order
to reuse them in your tests.
runner/AndroidTestOrchestratorSample/app/src/androidTest/java/com/example/android/testing/androidtestorchestratorsample/CalculatorAddParameterizedTest.java