LOS ANGELES-Existential outer-space thriller “Gravity,” corruption tale “American Hustle” and independent drama “Fruitvale Station” are among the 10 best films of the year announced by the American Film Institute (AFI) on Monday, kicking off a key week in Hollywood’s awards season. The annual AFI list also picked Somali piracy thriller “Captain Phillips,” slavery drama “12 Years a Slave,” comedy-drama “Nebraska,” futuristic romance “Her,” Disney-history drama “Saving Mr. Banks,” folk music comedy-drama “Inside Llewyn David” and Martin Scorsese’s “The Wolf of Wall Street” as the year’s top films.