By Diana Powers, Contributor [Interscope; 2016] Rating: 8/10 Key Tracks: “Borders,” “AMP (All My People),” “Ali r u ok?” M.I.A. is nothing short of a legend. Since her 2007 hit “Paper Planes” pushed her into the mainstream, M.I.A. has been one of the most outspoken forces in music. From flashing her middle finger during her 2012 Super…