The games may or may not be on-topic
Some of the Angry Birds games (at least the first one) simply do not contain enough science fiction or fantasy elements to generally be on-topic. Narrow questions about their science fiction aspects (if any) might be acceptable, though. The situation might be different for many individual games, such as Angry Birds Transformers, or Angry Birds Star Wars, which are science fiction and connected to an established property to boot, or the Angry Birds Epic RPG, which appears to be fantasy.
That said, all video games should be on-topic at Arquade.
The movie is on-topic
The pigs possess technology, but nothing more advanced than what was available at the time the movie was created (airplanes and so forth). However, the birds' special powers, which are little more than mechanics in the game (and thus do not qualify it as SFF) are, well, special powers. For example, Bomb can blow himself up and create an electric shockwave in the movie, which is a clear super-power. As such, the movie is on-topic.
The general principle
Current site policy says that anthropomorphic animals by themselves are not enough to render a work on-topic. Though there remains disagreement, that is the current community consensus. As such, a movie such as The Angry Birds Movie would have to possess additional speculative fiction elements in order to be considered science fiction or fantasy (and does).