-- v3: uiautomationcore: Use EVENT_OBJECT_DESTROY to remove HWNDs from the COM API focus change HWND map. uiautomationcore: Use EVENT_OBJECT_FOCUS to advise HWND providers of focus change events in the COM API. uiautomationcore: Query EVENT_OBJECT_FOCUS HWND for a serverside provider if there is a registered focus change event handler. uiautomationcore/tests: Add tests for IUIAutomationFocusChangedEventHandler event advisement behavior.