[TIMOB-16212] Android: ActionBar expose setDisplayShowHomeEnabled and setDisplayShowTitleEnabled

   var win = Ti.UI.createWindow({
       title : "Actionbar Title",
       navBarHidden : false,
       layout : 'vertical'
   });
   
   var b3 = Ti.UI.createButton({
       title : "Toggle setDisplayShowHomeEnabled"
   });
   
   var b4 = Ti.UI.createButton({
       title : "Toggle setDisplayShowTitleEnabled"
   });
    
   var actionBar;
   
   win.add(b3);
   win.add(b4);
    
   var home = false;
   var title = false;
   b3.addEventListener("click", function() {
       if (actionBar) {
       	if (home) {
           	actionBar.setDisplayShowHomeEnabled(home);
           	home = false;
           } else {
            	actionBar.setDisplayShowHomeEnabled(home);
           	home = true;
           }
    
       } else {
           Ti.API.warn("Action bar not available.");
       }
   });
   b4.addEventListener("click", function() {
       if (actionBar) {
           if (title) {
           	actionBar.setDisplayShowTitleEnabled(title);
           	title = false;
           } else {
           	actionBar.setDisplayShowTitleEnabled(title);
           	title = true;
           }
    
       } else {
           Ti.API.warn("Action bar not available.");
       }
   });
   
   
   win.addEventListener("open", function() {
       if (Ti.Platform.osname === "android") {
           if (! win.activity) {
               Ti.API.error("Can't access action bar on a lightweight window.");
           }
           actionBar = win.activity.actionBar;
       }
   });
    
   win.open();