fix forms

Author: lochidev

src/Platforms/Android/Services/ExpanderAccessibilityService.cs

@@ -429,6 +429,7 @@ protected override void OnServiceConnected()
             };
             floatView.SetOnTouchListener(this);
             rowContainer = floatView.FindViewById<LinearLayout>(Microsoft.Maui.Resource.Id.rowContainer);
+            windowManager = GetSystemService(WindowService).JavaCast<IWindowManager>();
         }
     }