YAOUNDÉ, Cameroon — The Dutch government wants Britain inside a Western “steel wall” to counter Chinese overcapacity, Trade Minister Sjoerd Sjoerdsma has said. “One way or another, we should find ways [where] if we build a wall … when it comes to steel, that this wall encompasses as much of our friends as possible,” Sjoerdsma told POLITICO Wednesday, on the sidelines of a World Trade Organization summit in Cameroon.  As part of its trade deal with the U.S, the European Union is moving to ring-