feat(android): textAlignment for DatePicker

[m1ga]

expose the normal textAlignment property in the DatePicker

default, textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER and textAlign: Ti.UI.TEXT_ALIGNMENT_RIGHT

Test

var win = Ti.UI.createWindow({layout: 'vertical'});

var picker = Ti.UI.createPicker({
  type:Ti.UI.PICKER_TYPE_DATE,
  width: 400,
});

win.add(picker);
var picker = Ti.UI.createPicker({
  type:Ti.UI.PICKER_TYPE_DATE,
  width: 400,
	textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER
});

win.add(picker);
var picker = Ti.UI.createPicker({
  type:Ti.UI.PICKER_TYPE_DATE,
  width: 400,
	textAlign: Ti.UI.TEXT_ALIGNMENT_RIGHT
});

win.add(picker);
win.open();