D3321403 [NavigationExperimental][CleanUp]: Rename scene.navigationState to scene.route.

Summary:
[public / experimental API breaking change]

The data type of  `scene.navigationState` is `NavigationRoute`. Rename  `scene.navigationState` to
`scene.route` to avoid confusion such as treating `scene.navigationState` as the actual global navigation
state (type: NavigationState).

Reviewed By: ericvicenti

Differential Revision: D3331076

fbshipit-source-id: 3ed989cc8492d398cbeb1b12186459deb261d1fb

Libraries/CustomComponents/NavigationExperimental/NavigationCard.js

@@ -69,14 +69,13 @@ class SceneView extends React.Component<any, SceneViewProps, any> {
 
   static propTypes = {
     sceneRenderer: PropTypes.func.isRequired,
-    sceneRendererProps:
-      PropTypes.shape(NavigationPropTypes.SceneRenderer).isRequired,
+    sceneRendererProps: NavigationPropTypes.SceneRenderer,
   };
 
   shouldComponentUpdate(nextProps: SceneViewProps, nextState: any): boolean {
     return (
-      nextProps.sceneRendererProps.scene.navigationState !==
-        this.props.sceneRendererProps.scene.navigationState
+      nextProps.sceneRendererProps.scene.route !==
+        this.props.sceneRendererProps.scene.route
     );
   }
 

Libraries/CustomComponents/NavigationExperimental/NavigationCardStack.js

@@ -89,7 +89,7 @@ class NavigationCardStack extends React.Component<DefaultProps, Props, void> {
 
   static propTypes = {
     direction: PropTypes.oneOf([Directions.HORIZONTAL, Directions.VERTICAL]),
-    navigationState: NavigationPropTypes.navigationParentState.isRequired,
+    navigationState: NavigationPropTypes.navigationState.isRequired,
     onNavigate: NavigationPropTypes.SceneRendererProps.onNavigate,
     renderOverlay: PropTypes.func,
     renderScene: PropTypes.func.isRequired,