[TIMOB-24356] iOS: Add missing animation transitions (top to bottom, bottom to top, cross-dissolve)

   var win = Ti.UI.createWindow({
       backgroundColor: '#fff'
   });
   
   var view = Titanium.UI.createView({
       backgroundColor: 'red'
   });
   
   var view2 = Titanium.UI.createView({
       backgroundColor: 'blue'
   });
   
   var animation = Titanium.UI.createAnimation();
   animation.duration = 1000;
   animation.view = view2;
   
   var btn1 = Ti.UI.createButton({
       title: 'Animate 1',
       top: 40
   });
   
   btn1.addEventListener('click', function() {
       animation.transition = Ti.UI.iOS.AnimationStyle.FLIP_FROM_TOP;
       view.animate(animation);
   });
   
   var btn2 = Ti.UI.createButton({
       title: 'Animate 2',
       top: 80
   });
   
   btn2.addEventListener('click', function() {
       animation.transition = Ti.UI.iOS.AnimationStyle.FLIP_FROM_BOTTOM;
       view.animate(animation);
   });
   
   var btn3 = Ti.UI.createButton({
       title: 'Animate 3',
       top: 120
   });
   
   btn3.addEventListener('click', function() {
       view2.backgroundColor = (view2.backgroundColor == 'yellow') ? 'blue' : 'yellow';
       animation.transition = Ti.UI.iOS.AnimationStyle.CROSS_DISSOLVE;
       view.animate(animation);
   });
   
   win.add(view);
   win.add(btn1);
   win.add(btn2);
   win.add(btn3);
   win.open();