Add AnalyticsScreenTimer and track more screens.

Update Analytics with new methods in MXAnalyticsDelegate.

Riot/Modules/Room/Settings/RoomSettingsViewController.m

@@ -331,6 +331,8 @@ NSString *const kRoomSettingsAdvancedE2eEnabledCellViewIdentifier = @"kRoomSetti
     {
         self.selectedRoomSettingsField = _selectedRoomSettingsField;
     }
+    
+    [self.screenTimer start];
 }
 
 - (void)viewWillDisappear:(BOOL)animated
@@ -348,6 +350,12 @@ NSString *const kRoomSettingsAdvancedE2eEnabledCellViewIdentifier = @"kRoomSetti
     }
 }
 
+- (void)viewDidDisappear:(BOOL)animated
+{
+    [super viewDidDisappear:animated];
+    [self.screenTimer stop];
+}
+
 // Those methods are called when the viewcontroller is added or removed from a container view controller.
 - (void)willMoveToParentViewController:(nullable UIViewController *)parent
 {