SXSW has enlisted boldface names, including Jane Fonda, Demi Moore, Serena Williams, Keke Palmer and Andy Cohen, to deliver keynote addresses at the annual Austin-set festival. This year’s edition will be held from March 12-18. Among the films slated to premiere are horror comedy “Ready or Not 2: Here I Come,” Boots Riley’s comedic look at professional shoplifters “I Love Boosters” and John Carney’s “Power Ballad” with Paul Rudd and Nick Jonas as a past-his-prime wedding singer and a young