[TIMOB-3329] Android: format24 on picker not working

I have some code that may be relevant to this, planning to submit a pull request later this week.

This is not a defect, so I removed the "defect" tag and put in "feature". This was an undocumented flag, precisely because it was an unimplemented feature. :)

Nice test app.js for QE:

   /*global Ti, Titanium, alert, JSON, require, setTimeout, setInterval */
   Titanium.UI.setBackgroundColor('#000');
   var win = Titanium.UI.createWindow({  
       title:'Test',
       backgroundColor:'#000',
       exitOnClose: true
   });
   
   var lbl = Ti.UI.createLabel({
       bottom: "10dp", height: "40dp", left: 5, right: 5,
       backgroundColor: 'blue', color: 'yellow'
   });
   win.add(lbl);
   
   var p = Ti.UI.createPicker({
       type: Ti.UI.PICKER_TYPE_TIME, useSpinner:true, format24:false,
       top: 10, height: 'auto', width: 'auto'
   });
   p.addEventListener('change', function(e){
       lbl.text = e.value;
   });
   win.add(p);
   
   var btn = Ti.UI.createButton({
       bottom: "60dp", height: "40dp", left: 5, right: 5,
       title: 'Set to now'
   });
   win.add(btn);
   btn.addEventListener('click', function(){
       p.value = new Date();
   });
   
   var btn2 = Ti.UI.createButton({
       bottom: "105dp", height: "40dp", left: 5, right: 5,
       title: 'toggle am/pm'
   });
   win.add(btn2);
   btn2.addEventListener('click', function(){
       var format24 = p.format24;
       if (format24) {
           format24 = false;
       } else {
           format24 = true;
       }
       p.format24 = format24;
   });
   
   var btn3 = Ti.UI.createButton({
       bottom: "150dp", height: "40dp", left: 5, right: 5,
       title: 'check time'
   });
   win.add(btn3);
   btn3.addEventListener('click', function(){
       lbl.text = p.value;
   });
   win.open();