Added On...SelectedListeners as found in the ColorPicker.

I needed a good color picker with hsv selection in android, i found this one. But it lacked the SelectedListeners in the Bars. So i added these and tested the code. Ik works like a charm. :D

Added On...SelectedListeners to SaturationBar and ValueBar as it was implemented in the ColorPicker.
This event is only called when touch is released of the screen.