Two years have passed since we last saw Portuguese vocalist Mariza, who delivered a memorable performance at the Music Center at Strathmore. The Queen of Fado, as Mariza is known, will be performing this Sunday evening at the Lisner Auditorium. She is the world’s most prominent exponent of a style rooted in history and tradition, but fado clearly has universal appeal. Over the past decade, Mariza has not only performed in most of the…