Portugal. The Man may have flirted with the mainstream on 2013’s Evil Friends, but they more deeply embrace the sleek sound of modern pop radio with their eighth LP, Woodstock. On single-worthy fare like “Easy Tiger” and “Tidal Wave,” frontman/chief songwriter John Gourley croons breezy soul hooks in a featherlight falsetto, anchored by hiphop-styled drums, electronic buzzes and…