Clayton Davis The early days of awards season bring buzz and promise, but they also mean it’s time for studios to develop strategy and brainstorm opportunities to strike.With the Toronto International Film Festival handing out its prestigious People’s Choice prize to Kenneth Branagh’s “Belfast,” the Focus Features drama has the authority to declare itself the best picture front-runner for this awards season — but holding on to the throne won’t be easy.Speaking of thrones, Joel Coen’s adaptation