notify ace the drag event is end

Change-Id: Id9ba7038d22612ca49490efcfd6c96d9061d3d7a
Signed-off-by: l00574490 <liuqi149@huawei.com>

interfaces/innerkits/wm/wm_common.h

@@ -107,6 +107,7 @@ enum class WindowSizeChangeReason : uint32_t {
     RECOVER,
     ROTATION,
     DRAG,
+    DRAG_END,
     RESIZE,
     MOVE,
 };

wm/src/window_impl.cpp

@@ -1041,7 +1041,11 @@ void WindowImpl::EndMoveOrDragWindow(int32_t pointId)
     if (pointId != startPointerId_) {
         return;
     }
-    startDragFlag_ = false;
+
+    if (startDragFlag_) {
+        UpdateRect(GetRect(), WindowSizeChangeReason::DRAG_END);
+        startDragFlag_ = false;
+    }
     startMoveFlag_ = false;
     pointEventStarted_ = false;
 }