“Father, Son, and…” (1969) by Barkley L. Hendricks   ONE OF THE BIG DRAWS at the Jack Shainman booth at Frieze Los Angeles last month was a triptych by Barkley L. Hendricks (1945-2017) called “Father, Son,…” Given the title and the artist’s renown for making masterful portraits that convey his subject’s cool style and mien,...