[TIMOB-15515] Android: Add support for shadowOffset, shadowColor and shadowRadius on Label & Button

   var win = Ti.UI.createWindow({
   	backgroundColor : 'white',
   	exitOnClose : true,
   	fullscreen : false,
   	layout : 'vertical',
   	title : 'Label Demo'
   });
   
   var label = Ti.UI.createLabel({
   	color : '#900',
   	font : {
   		fontSize : 48
   	},
   	text : 'A simple label',
   	textAlign : Ti.UI.TEXT_ALIGNMENT_CENTER,
   	top : 30,
   	width : 500,
   	height : 200
   });
   
   var button = Ti.UI.createButton({
   	color : 'blue',
   	font : {
   		fontSize : 48
   	},
   	width : 500,
   	height : 200,
   	title : 'A simple button',
   });
   
   var i=0;
   
   var change = Ti.UI.createButton({
   	top: 50,
   	title: "change the shadow of the label and button"
   });
   
   change.addEventListener("click", function(){
   	if (i%2 == 0) {
   		label.shadowColor = "#aaa";
   		label.shadowOffset = {x: 10, y: 10};
   		label.shadowRadius = 3;
   		button.shadowColor = "#aaa";
   		button.shadowOffset = {x: 10, y: 10};
   		button.shadowRadius = 3;
   	} else {
   		label.shadowColor = "yellow";
   		label.shadowOffset = {x: -20, y: -20};
   		label.shadowRadius = 10;
   		button.shadowColor = "yellow";
   		button.shadowOffset = {x: -20, y: -20};
   		button.shadowRadius = 10;
   	}
   	i++;
   });
   
   win.add(label);
   win.add(button);
   win.add(change);
   win.open();