TimePickerControlled

A TimePicker may have controlled selection and value. There are a few things to keep in mind:

1. Control selectedTime with value (or defaultSelectedTime with defaultValue): When the selectedTime is controlled or a defaultSelectedTime is provided, a controlled value or defaultValue must also be defined. Otherwise, the TimePicker will not be able to display a value before the Options are rendered.
2. Clearing input with null: when controlled, the selectedTime prop should use null instead of undefined to clear the value of the TimePicker.