Hollywood long ago ceded “love that stands the test of time” to the realm of science-fiction and fantasy, so “The Age of Adaline” falls neatly into a genre that includes “The Time Traveler’s Wife,” “About Time,” and even “Somewhere in Time.” But building this film around all the willowy, world-weary grace that Blake “Gossip Girl” Lively can muster pays off. As a 20-something who stopped aging 80 years ago, Lively suggests several lifetimes of experience in a love story that ranges from wistful to hopeful, a romance whose female half understands its consequences.