AT&T watchers have been waiting to see what it will do with DirecTV now that the companies are united, turning the telco into the world’s largest pay TV provider. That makes the announcement today of what it calls the first nationwide combo wireless phone and TV package interesting, even if it was predictable. AT&T hopes to lure customers from cable and Dish Network by offering promotional bargains beginning August 10 to people who are new to DirecTV, its wired U-verse…