Xfx ComboBox Gaps between list items

How to **Decrease the gap** between **XfxCombobox** list items?

# Bug 

* Version Number of Control:
* Device Tested On: Android
* Simulator Tested On:

### Affects

- [ ] iOS
- [x] Android

### Expected Behavior
 There should be an option to reduce the gap between list items of XfxCombobox

Thank you.