Rename setTiming to applyAnimation

Summary:Given that you can do all kinds of animations other than `Animated.timing`, it made no sense to have `setTiming`. In addition, you can't intuitively tell that this is the callback where you would do custom animations.

The discussion took place on Discord with ericvicenti: https://discordapp.com/channels/102860784329052160/154015578669973504
Closes https://github.com/facebook/react-native/pull/6235

Differential Revision: D2999121

Pulled By: hedgerwang

fb-gh-sync-id: f587b865de11ba5e8dc9c430720252ffb5d12794
shipit-source-id: f587b865de11ba5e8dc9c430720252ffb5d12794

Libraries/NavigationExperimental/NavigationAnimatedView.js

@@ -63,12 +63,12 @@ function compareScenes(
 }
 
 type Props = {
+  applyAnimation: NavigationAnimationSetter,
   navigationState: NavigationParentState,
   onNavigate: (action: any) => void,
-  renderScene: NavigationSceneRenderer,
   renderOverlay: ?NavigationSceneRenderer,
+  renderScene: NavigationSceneRenderer,
   style: any,
-  setTiming: NavigationAnimationSetter,
 };
 
 type State = {
@@ -79,15 +79,15 @@ type State = {
 const {PropTypes} = React;
 
 const propTypes = {
+  applyAnimation: PropTypes.func,
   navigationState: NavigationPropTypes.navigationState.isRequired,
   onNavigate: PropTypes.func.isRequired,
-  renderScene: PropTypes.func.isRequired,
   renderOverlay: PropTypes.func,
-  setTiming: PropTypes.func,
+  renderScene: PropTypes.func.isRequired,
 };
 
 const defaultProps = {
-  setTiming: (
+  applyAnimation: (
     position: NavigationAnimatedValue,
     navigationState: NavigationParentState,
   ) => {
@@ -152,7 +152,7 @@ class NavigationAnimatedView
 
   componentDidUpdate(lastProps: Props): void {
     if (lastProps.navigationState.index !== this.props.navigationState.index) {
-      this.props.setTiming(
+      this.props.applyAnimation(
         this.state.position,
         this.props.navigationState,
         lastProps.navigationState