Port stylus shutdown fix from 4.8

src/Microsoft.DotNet.Wpf/src/PresentationCore/System/Windows/InterOp/HwndSource.cs

@@ -1565,6 +1565,22 @@ private IntPtr InputFilterMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lP
             IntPtr result = IntPtr.Zero ;
             WindowMessage message = (WindowMessage)msg;
 
+            if (message == WindowMessage.WM_DESTROY)
+            {
+                // shut down the stylus stack on WM_DESTROY.  This is normally done
+                // in PublicHooksFilterMessage (see remarks there), but that won't
+                // get called if no public hooks have ever been installed.  Do it
+                // here as a backup for that case.
+                // For maintenance, there are three workflows to consider:
+                // 1. The normal case - public hooks are present, none of them
+                //      handle WM_DESTROY.  DisposeStylusInputProvider gets
+                //      called twice, but the second call is a no-op.
+                // 2. No public hooks present.  Only this call happens.
+                // 3. Public hooks are present, one of them handles WM_DESTROY.
+                //      Only the call in PublicHooksFilterMessage happens.
+                DisposeStylusInputProvider();
+            }
+
             // NOTE (alexz): invoke _stylus.FilterMessage before _mouse.FilterMessage
             // to give _stylus a chance to eat mouse message generated by stylus
             if (!_isDisposed && _stylus != null && !handled)