[Sergio0694]

Closes #502

Description

This PR adds support for registering effect factories for PixelShaderEffect<T> objects. This allows creating a new RCW from an orphaned D2D effect that was previously retrieved from a PixelShaderEffect<T>, which as since been unrealized/changed.

[Sergio0694]

Currently seems to crash with .NET Native, investigating:

[Sergio0694]

Minimal repro:

Source code (click to expand):

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();

        Test();
    }

    void Test()
    {
        var myClass = new MyClass();

        IntPtr myClassUnknown = Marshal.GetIUnknownForObject(myClass);
        Guid myClassGuid = typeof(IMyInterface).GUID;

        int hresult = Marshal.QueryInterface(myClassUnknown, ref myClassGuid, out _);

        Marshal.ThrowExceptionForHR(hresult);
    }
}

[Guid("E042D1F7-F9AD-4479-A713-67627EA31863")]
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IMyInterface
{
    [PreserveSig]
    int Foo();
}

public sealed class MyClass : IMyInterface
{
    unsafe int IMyInterface.Foo()
    {
        return 0;
    }
}