Andre Jackson Jr. and Jalen Pickett are slated to make their NBA Summer League debuts against each other on Friday.Jackson, an Amsterdam native and Albany Academy graduate, and the Milwaukee Bucks will take on Pickett, who starred at Siena for the first three years of his college basketball career, and the Denver Nuggets on Friday at 5 p.m. at Thomas & Mack Center in Las Vegas. The game will be televised on ESPNU.The NBA’s annual summer league in Las Vegas starts Friday and runs through July 17. Each team will play four games by July 14, with the playoffs to…