ALG has released its annual Resale Value Awards. For 2012, Subaru took home the home the honor of being the top mainstream brand, while Lexus nabbed the top luxury automaker designation. ALG says that once again, Japanese automakers have performed better than their American and European counterparts when it comes to resale. Of the 21 total ALG awards, 11 went to Japanese manufacturers, though Audi bucked that trend by being the single automaker to take…