[TIMOB-2721] Android: implement the "contentOffset" property for the "scroll" event in TableView

   Ti.UI.setBackgroundColor('#000');
   
       var win = Ti.UI.createWindow({
         backgroundColor: 'black',
         exitOnClose: true,
         fullscreen: false,
         title: 'TableView Demo'
       });
       
       // generate random number, used to make each row appear distinct for this example
       function randomInt(max){
         return Math.floor(Math.random() * max) + 1;
       }
       
       var IMG_BASE = 'https://github.com/appcelerator/titanium_mobile/raw/master/demos/KitchenSink/Resources/images/';
       var defaultFontSize = Ti.Platform.name === 'android' ? 16 : 14;
       
       var tableData = [];
       
       for (var i=1; i<=20; i++){
         var row = Ti.UI.createTableViewRow({
           className:'forumEvent', // used to improve table performance
           selectedBackgroundColor:'white',
           rowIndex:i, // custom property, useful for determining the row during events
           height:110
         });
         
         var imageAvatar = Ti.UI.createImageView({
           image: IMG_BASE + 'custom_tableview/user.png',
           left:10, top:5,
           width:50, height:50
         });
         row.add(imageAvatar);
         
         var labelUserName = Ti.UI.createLabel({
           color:'#576996',
           font:{fontFamily:'Arial', fontSize:defaultFontSize+6, fontWeight:'bold'},
           text:'Fred Smith ' + i,
           left:70, top: 6,
           width:200, height: 30
         });
         row.add(labelUserName);
         
         var labelDetails = Ti.UI.createLabel({
           color:'#222',
           font:{fontFamily:'Arial', fontSize:defaultFontSize+2, fontWeight:'normal'},
           text:'Replied to post with id ' + randomInt(1000) + '.',
           left:70, top:44,
           width:360
         });
         row.add(labelDetails);
         
         var imageCalendar = Ti.UI.createImageView({
           image:IMG_BASE + 'custom_tableview/eventsButton.png',
           left:70, bottom: 2,
           width:32, height: 32
         });
         row.add(imageCalendar);
         
         var labelDate = Ti.UI.createLabel({
           color:'#999',
           font:{fontFamily:'Arial', fontSize:defaultFontSize, fontWeight:'normal'},
           text:'on ' + randomInt(30) + ' Nov 2012',
           left:105, bottom:10,
           width:200, height:20
         });
         row.add(labelDate);
         
         tableData.push(row);
       }
       
       var tableView = Ti.UI.createTableView({
         backgroundColor:'white',
         data:tableData
       });
       
       win.add(tableView);
       win.open();
   
   tableView.addEventListener('scroll', function(e)
   {
      //Ti.API.info('x|y ' + e.contentOffset.x + '|' + e.contentOffset.y);//it will be undefined indeed ... 
      Ti.API.info('-------------------');
   	Ti.API.info( 'firstVisibleItem : Number - Row index of the topmost visible row in the view: ' + e.firstVisibleItem);
   	Ti.API.info( 'totalItemCount : Number - Total number of rows in the view: ' + e.totalItemCount );
   	Ti.API.info( 'visibleItemCount : Number - Number of rows currently visible in the view: '+ e.visibleItemCount );
   });