PickerPage close button can't be set as NavigationButton in Android (left to title)

Currently the PickerPage in Android can't be configured on the left with the androidCloseButtonPosition property. Please allow doing so by adding a new property value, e.g. "navigationButton"

### Which platform(s) does your issue occur on?
- Android

### Please, tell us how to recreate the issue in as much detail as possible. 
Try to set the close button in Android to the left of the title