[TIMOB-16888] Android: Add Actionbar.setHomeButtonEnabled functionality

   var win = Ti.UI.createWindow({});
   var actionBar, homeButtonEnabled = true;;
   
   var btn = Ti.UI.createButton({
   	title: 'Toggle homeButtonEnabled',
   	width: "90%",
   	height: "50dp"
   });
   btn.addEventListener('click', function() {
   	homeButtonEnabled = !homeButtonEnabled;
   	actionBar.setHomeButtonEnabled(homeButtonEnabled);
   });
   win.add(btn);
   
   win.addEventListener("open", function() {
       if (Ti.Platform.osname === "android") {
           actionBar = win.activity.actionBar;
           if (actionBar) {
               actionBar.title = "New Title";
               actionBar.onHomeIconItemSelected = function() {
                   alert("Home icon clicked!");
               };
           }
       }
   });
   
   win.open();