[AC-591] DeviceToken null on Android

   var win = Ti.UI.createWindow({
       backgroundColor : '#ccc',
       title : 'Android Cloud Push Notification'
   });
   
   var CloudPush = require('ti.cloudpush');
   CloudPush.debug = true;
   CloudPush.enabled = true;
   CloudPush.showTrayNotificationsWhenFocused = true;
   CloudPush.showTrayNotification = true;
   CloudPush.focusAppOnPush = false;
   
   var deviceToken = null;
   var Cloud = require('ti.cloud');
   Cloud.debug = true;
   
   var submit = Ti.UI.createButton({
       title : 'Register For Push Notification',
       color : '#000',
       height : 60,
       width : 200,
       top : 100,
   });
   
   win.add(submit);
   
   submit.addEventListener('click', function(e) {
       loginDefault();
   });
   
   var submit1 = Ti.UI.createButton({
       title : 'Subscribe Device',
       color : '#000',
       height : 60,
       width : 200,
       top : 200,
   });
   
   win.add(submit1);
   
   submit1.addEventListener('click', function(e) {
       defaultSubscribe();
   });
   
   var submit2 = Ti.UI.createButton({
       title : 'Unsubscribe Device',
       color : '#000',
       height : 60,
       width : 200,
       top : 300,
   });
   
   win.add(submit2);
   
   submit2.addEventListener('click', function(e) {
       defaultUnSubscribe();
   });
   
   CloudPush.retrieveDeviceToken({
       success : deviceTokenSuccess,
       error : deviceTokenError
   });
   
   function deviceTokenSuccess(e) {
       deviceToken = e.deviceToken;
   }
   
   function deviceTokenError(e) {
       alert('Failed to register for push notifications! ' + e.error);
   }
   
   CloudPush.addEventListener('callback', function(evt) {
       alert("Notification received: " + evt.payload);
   });
   
   CloudPush.addEventListener('trayClickLaunchedApp', function(evt) {
       Ti.API.info('Tray Click Launched App (app was not running)');
   });
   
   CloudPush.addEventListener('trayClickFocusedApp', function(evt) {
       Ti.API.info('Tray Click Focused App (app was already running)');
   });
   
   function loginDefault(e) {
       Cloud.Users.login({
           login : 'User Email',
           password : 'Pass'
       }, function(e) {
           if (e.success) {
               alert("Successfully Loged In");
           } else {
               alert('Error: ' + ((e.error && e.message) || JSON.stringify(e)));
           }
       });
   }
   
   function defaultSubscribe() {
       Cloud.PushNotifications.subscribe({
           channel : 'alert',
           device_token : deviceToken,
           type : 'android'
       }, function(e) {
           if (e.success) {
               alert('Device Subscribed!');
           } else {
               alert('Error:' + ((e.error && e.message) || JSON.stringify(e)));
           }
       });
   }
   
   function defaultUnSubscribe() {
       Cloud.PushNotifications.unsubscribe({
           channel : 'alert',
           device_token : deviceToken,
           type : 'android'
       }, function(e) {
           if (e.success) {
               alert('Device Unsubscribed!');
           } else {
               alert('Error:\n' + ((e.error && e.message) || JSON.stringify(e)));
           }
       });
   }
   
   win.open();