The ColorPickerDialog is not supporting an initialColor and a FlagView

**Overview**
- Library ColorPickerView@2.2.4
 
**Bug:**
As in the ColorPickerView component, I'd expect to have the same options on the ColorPickerDialog. What do I mean with the same options? Im talking about the method .setInitialColor() and the ability to set a flagView as well.

Do you have some solution to set an initial color in a ColorPickerDialog?
