[TIMOB-8192] Android: Open events do not fire for windows on tabs

   // this sets the background color of the master UIView (when there are no windows/tab groups on it)
   Titanium.UI.setBackgroundColor('#000');
   
   // create tab group
   var tabGroup = Titanium.UI.createTabGroup();
   
   
   //
   // create base UI tab and root window
   //
   var win1 = Titanium.UI.createWindow({  
       title:'Tab 1',
       backgroundColor:'#fff'
   });
   
   win1.addEventListener('open', function(){
   	alert('win1 open event fired');
   });
   
   var tab1 = Titanium.UI.createTab({  
       icon:'KS_nav_views.png',
       title:'Tab 1',
       window:win1
   });
   
   var label1 = Titanium.UI.createLabel({
   	color:'#999',
   	text:'I am Window 1',
   	font:{fontSize:20,fontFamily:'Helvetica Neue'},
   	textAlign:'center',
   	width:'auto'
   });
   
   win1.add(label1);
   
   //
   // create controls tab and root window
   //
   var win2 = Titanium.UI.createWindow({  
       title:'Tab 2',
       backgroundColor:'#fff'
   });
   
   win2.addEventListener('open', function(){
   	alert('win2 open event fired');
   });
   
   var tab2 = Titanium.UI.createTab({  
       icon:'KS_nav_ui.png',
       title:'Tab 2',
       window:win2
   });
   
   var label2 = Titanium.UI.createLabel({
   	color:'#999',
   	text:'I am Window 2',
   	font:{fontSize:20,fontFamily:'Helvetica Neue'},
   	textAlign:'center',
   	width:'auto'
   });
   
   win2.add(label2);
   
   
   
   //
   //  add tabs
   //
   tabGroup.addTab(tab1);  
   tabGroup.addTab(tab2);  
   
   
   // open tab group
   tabGroup.open();