Bruno Mars has been a one-man hitmaking machine.But while racking up smash solo singles such as “Just the Way You Are,” “Locked Out of Heaven” and “24K Magic,” the 35-year-old pop superstar has also played exceptionally well with others.In fact, Silk Sonic — Mars’ side project with alt-R&B artist Anderson Paak — recently went No. 1 with the Philly soul throwback “Leave the Door Open,” which the pair performed at the Grammys last month.