Update check for LastName value in GetClaimsFromUser()

When the previous page is the MainView, switching from mock to real
services will force re-authentication by navigating to the LoginView.

Because of the using blocks, these one line methods need the async
modifier so that the that async state machiner is created. Otherwise, if
the method does not complete synchronously, the connection is closed
before the database has returned its results.

The methods that return collections should return
Task<IEnumerable<dynamic>> not Task<dynamic>

Consolidated Json.NET to 9.0.1.
Updated Microsoft.NetCore.UniversalWindowsPlatform to 5.3.3.
Added Autofac to iOS and Droid app projects.

Instead to register EventHandlers we register Func<EventHandlers> which solves scope problems (having transient/scoped objects owned by singletons)