[TIMOB-14319] iOS: Implement the scroll/drag start/end events for ListView

   function genSection(sectionIndex) {
       var section = Ti.UI.createListSection({ headerTitle: 'Section '+sectionIndex});
       var data = [];
       var row=1;
       while(row<21) {
           data.push({properties:{title:'Section '+sectionIndex+' Row '+row}});
           row++;
       }
       section.setItems(data);
       return section;
   }
   
   var win = Ti.UI.createWindow({backgroundColor: 'white'});
   var listView = Ti.UI.createListView();
   var sections = [];
   var indices = [];
   var sc=0;
   while(sc<10) {
       sections.push(genSection(sc+1));
       indices.push({index:sc,title:'S'+sc});
       sc++;
   }
   
   listView.sections = sections;
   listView.sectionIndexTitles = indices;
   
   listView.setMarker({sectionIndex:5,itemIndex:15});
   listView.addEventListener('marker',function(e){
       Ti.API.info('GOT MARKER EVENT');
   })
   win.add(listView);
   win.open();