lv_cover_check_info_t struct

Used as the event parameter of ::LV_EVENT_COVER_CHECK to check if an area is covered by the object or not. In the event use `const lv_area_t * area = lv_event_get_cover_area(e)` to get the area to check and `lv_event_set_cover_res(e, res)` to set the result.