KHIMKI, Russia (Reuters) -U.S. basketball star Brittney Griner went on trial in a court on the outskirts of Moscow on Friday to hear drug charges that could see her serve up to 10 years in a Russian jail. Griner, 31, was formally told at this first hearing that she was charged with intentionally importing narcotics into Russia. She spoke to say she understood the charges. The judge set the next hearing for July 7. Griner, who has played regularly in Russia as well as in the U.S. Women’s National Basketball Association (WNBA), was arrested at a Moscow airport in February, allegedly with vape ca…