Use matrix-analytics-events generated stubs (locally for now).

Track screens, removing any that aren't part of the schema.

Riot/Modules/Home/HomeViewController.m

@@ -68,8 +68,6 @@
     selectedSection = -1;
     selectedRoomId = nil;
     selectedCollectionViewContentOffset = -1;
-    
-    self.screenName = @"Home";
 }
 
 - (void)viewDidLoad
@@ -102,6 +100,9 @@
 {
     [super viewWillAppear:animated];
     
+    // Screen tracking
+    [Analytics.shared trackScreen:AnalyticsScreenHome];
+    
     [AppDelegate theDelegate].masterTabBarController.navigationItem.title = [VectorL10n titleHome];
 
     [ThemeService.shared.theme applyStyleOnNavigationBar:[AppDelegate theDelegate].masterTabBarController.navigationController.navigationBar];