KHIMKI, Russia (Reuters) -The Russian drugs trial of U.S. basketball star Brittney Griner should be over “very soon”, her lawyer said on Tuesday, as the Kremlin warned the United States that megaphone diplomacy would not secure a prisoner swap for the 31-year-old Texan. Griner, a two-time Olympic gold medallist and a Women’s National Basketball Association (WNBA) star, was detained at Moscow’s Sheremetyevo airport on Feb. 17 with vape cartridges containing hashish oil in her luggage. She has pleaded guilty to the drugs charges against her but has denied that she intended to break Russian law. …