[TIMOB-25917] Android: Allow picker minDate/maxDate properties to be set dynamically

On iOS it is possible to change the minDate/maxDate on runtime, on Android this is not possible due to TiSDK constraint in the code. Test code

var win = Ti.UI.createWindow({
    title: 'Form',
});

/*
// working
var dp = Ti.UI.createPicker({
   type: Ti.UI.PICKER_TYPE_DATE,
   minDate: new Date(2018,1,1)
});
*/

var dp = Ti.UI.createPicker({
   type: Ti.UI.PICKER_TYPE_DATE
});

// not working
dp.setMinDate(new Date(2018,1,1));

win.add(dp);
dp.showDatePickerDialog();
win.open();

*Observed Behaviour:* Setting minDate on creation works, adjusting it after doesn't *Expected behaviour*: On Android setting minDate/maxDate on runtime (after creation) should work as it does on iOS. *Community Credit*: Joren Vos for finding the issue, Michael Gangolf for helping locating the problem/creating test code.