Draft API for adding NSUserActivity to Titanium. This allows for the support of hand off, search, etc

app.js

var activity = Titanium.App.iOS.createUserActivity({
	activityType : "com.appcelerator.handoff.example.browsing-location"
	userInfo : someDictionary,
	needsSave : false,
	webpageUrl : "optional webpage",
	title : "an example"
});

activity.addEventListener("useractivitywascontinued",function(e){
	
	console.info(e.activityType);
	console.info(e.userInfo);
	console.info(e.webpageUrl);
	console.info(e.title);

});

//You also have the ability to update those properties created at runtime
activity.setUserInfo(someDictionary); //Update userInfo
activity.setWebpageUrl("some url"); //Update webpageUrl
activity.setTitle("an example title"); //Update title

activity.becomeCurrent(); // creates the NSUserActivity
activity.invalidate(); // make invalid

//For iOS 9 

activity.setEligibleForPublicIndexing(true); //A Boolean value that indicates if the activity can be added to a public index that can inform searches by any user of your app on any device.

activity.setEligibleForSearch(true); //A Boolean value that indicates if the activity should be indexed by app history.

activity.setEligibleForHandoff(true);  //A Boolean value that indicates if the activity can be handed off to another device using Handoff.

activity.setExpirationDate(new Date(2015,0,1)); //The date after which the activity is no longer eligible to be indexed or handed off.

activity.resignCurrent(); // Tells the activity that it should no longer be the activity currently in use by the user.