Delay updating state until animations completed

[jadnco]

As the Navigator transitions between views there is a bit of a hiccup. This is because the animations and rendering the large assets (photos) happen asynchronously.

The InteractionManager API should be used to facilitate the necessary changes. Waiting until all animations have finished to render will make the app feel a whole lot smoother.

https://facebook.github.io/react-native/docs/interactionmanager.html#content

[jadnco]

From the Performance docs:

componentDidMount() {
    InteractionManager.runAfterInteractions(() => {
      this.setState({renderPlaceholderOnly: false});
    });
  }

[jadnco]

Implemented, works great. Closed in https://github.com/jadnco/locus/commit/6201ed73209930d3202e8247d71757d1d05745f5.