ListView with Extended selection mode can have multiple items still been selected after reorder.

### Describe the bug

When SelectionMode="Extended" and CanReorderItems="True" after reordering the items multiple items still be selected

### Steps to reproduce the bug

Start a WinAppSDK+WinUI3 app project add the following code:
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Run the application.
Drag a group of items.
click another item and those group of item are still been selected

### Expected behavior

Group of items still been after selected drag

### Screenshots

https://github.com/user-attachments/assets/ec2274fc-31cf-43bd-889c-d195682c47f4

### NuGet package version

WinUI 3 - Windows App SDK 1.7.1: 1.7.250401001

### Windows version

Windows 11 (24H2): Build 26100

### Additional context

_No response_

Start by reproducing the issue in a WinAppSDK WinUI 3 app using the ListView settings and item template shown. Trace the ListView selection and reorder behavior, then clarify the intended selection state after dragging and clicking another item; done means the observed behavior matches that clarified expectation.

Written by the indexing model from the issue text.