titlebar customization and AppWindowPresenterKind.FullScreen crashes winforms app

### Describe the bug

when trying to enter full screen using the API, i keep experiencing crash on my packaged winforms app (with windowsappsdk nuget installed).

other modes such as `Default`, `CompactOverlay`, etc work just fine.

### Steps to reproduce the bug

1. create winforms app
2. setup to use windows app sdk
3. create msix installer project and reference the winforms app
4. create a button
```cs
// in the form.
AppWindow GetAppWindow()
{
return AppWindow.GetFromWindowId(
Win32Interop.GetWindowIdFromWindow(this.Handle));
}

// in the button.
GetAppWindow().SetPresenter(AppWindowPresenterKind.FullScreen);
```

### Expected behavior

no crash

### Screenshots

_No response_

### NuGet package version

Windows App SDK 1.6.6: 1.6.250228001

### Packaging type

Packaged (MSIX)

### Windows version

Windows 11 version 24H2 (22621, October 2024 Update)

### IDE

Visual Studio 2022

### Additional context

_No response_

No source file or test is named. First reproduce the crash in the packaged WinForms app using AppWindowPresenterKind.FullScreen and capture the failure details; done means the same call enters full screen without crashing on the reported Windows App SDK and Windows version.

Written by the indexing model from the issue text.