[TIMOB-6029] Android: Response cache doesn't request images after they are cleaned

   Titanium.UI.setBackgroundColor('#000');
   
   
   var win1 = Titanium.UI.createWindow({  
       title:'Tab 1',
       backgroundColor:'#fff'
   });
   
   var button = Titanium.UI.createButton({
       title:'open new window'
   });
   
   var webview = Ti.UI.createImageView({
       top: 0, left: 0, width: 100, height: 50,
       image: 'http://www.appcelerator.com/wp-content/themes/appcelerator/img/APPC_logo.png'
   });
   
   var win2 = Titanium.UI.createWindow({  
       title:'Tab 2',
       backgroundColor:'#fff'
   });
   
   win2.add(webview);
   
   button.addEventListener('click', function(){
       win2.open();
   });
   
   var button2 = Titanium.UI.createButton({
       title:'close window'
   });
   
   button2.addEventListener('click', function(){
       win2.close();
   });
   
   win2.add(button2);
   
   win1.add(button);
   win1.open();