[TIMOB-1908] Android: contacts picker callbacks never fired if showContacts called from other context

This is yet another context/activity issue.

failcase app.js:

/*global Ti, Titanium, alert, JSON */
Titanium.UI.setBackgroundColor('#000');
var win = Titanium.UI.createWindow({  
    title:'Test',
    backgroundColor:'#fff',
    fullscreen: true,
    exitOnClose: true
});

var btn = Ti.UI.createButton({
    title: 'contacts'
});
btn.addEventListener('click', function() {
    Ti.Contacts.showContacts({
        selectedPerson: function(){Ti.API.info('!!!!!!!!! SELECTED');}
    });
});

win.add(btn);
win.open();

So in this example, the button to open the picker is in a heavyweight window. But the button was placed there -- and the listener added -- from the root context.

Debugging in Eclipse, I can see that the picker activity onResult is not even hit.

If you move the code that creates the button/event listener into the heavyweight window's own JS file, it works.

If you look in our http://github.com/appcelerator/titanium_mobile/blob/android_native_refactor/android/modules/contacts/src/ti/modules/titanium/contacts/ContactsModule.java#L126"> ContactsModule.java on the line where we setup calling the picker activity (using TiActivitySupport), you can see we're using the activity of the context, which in our example above will be the root context and therefore not correspond to the Activity of the heavyweight window.