Add a runtime switch option to disable ValueChangedEventManager

When binding to objects which do not implement `INotifyPropertyChanged` interface, the underlying data binding engine will use an obscure mechanism to try and listen to changes in any .NET object - ValueChangedEventManager.

Please, add a switch which disables this functionality. All WPF developers know that if we want change notifications, we should implement `INotifyPropertyChanged`.

This will improve the overwall WPF data binding performance, because there are a lot of cases where we need to databind to something (e.g. Length property of an array) which doesn't implement INotifyPropertyChanged.