BARCELONA — Does buying a smartphone from certain Chinese brands expose you to spying?Ordinarily you’d judge the Mate 10 Pro from China's Huawei on its its lovely 6-inch OLED display and exceptional battery life. But there’s a bigger issue beyond the specs of the flagship handset from the No. 3 phone maker in the world, which has been banking on the $799.99 smartphone to challenge Samsung Galaxy and iPhone in North America.Lawmakers in the United States have placed Huawei and another Chinese manufacturer, ZTE, in the crosshairs over their reputed ties to the Chinese intelligence and militarySEE DETAILS