WARSAW, Poland — Polish President Andrzej Duda has spoken on the phone with Congolese President Felix Tshisekedi to try to obtain the release of a Polish traveler who was sentenced to life in prison in the Central African country on espionage charges, an aide said Monday. Congolese forces detained Mariusz Majewski, 52, in February and he later faced a military court in the restive nation, accused …