Losing John Frusciante for a second time doesn’t send the Red Hot Chili Peppers into a tailspin. By now, the Chili Peppers shed guitarists like a second skin, changing their outer layer but retaining their inner core. Such is the case with I’m with You, the band’s first album since 2006’s Stadium Arcadium. If that double-disc was defined by its unwieldy sprawl, its songs spewed not sequenced, I’m with You is characterized by its focus, both within individual tunes and the songs as a whole…