Director Matt Reeves takes over for “Dawn of the Planet of the Apes,” a sequel that maintains the themes of the original while placing a greater focus on action and spectacle. That type of shift has the potential to doom a franchise, but Reeves’ work is so good that he takes the series to new heights. “Dawn” is more exciting and action-packed than it’s predecessor, but it’s also exceedingly smart, and it features an Oscar-worthy, motion-capture performance by Andy Serkis.