Kill NavigationExperimental Containers

Summary:
The containers in NavigationExperimental are not appropraite because the state should be held by the app's architecture, be it redux, flux, or simple component state.

This diff moves the examples over to simple component state, but there are several other examples of how to use NavigationAnimatedView and the navigation reducers with redux:

- https://github.com/jlyman/RN-NavigationExperimental-Redux-Example
- Switching the f8 app with redux to navigation experimental: https://github.com/fbsamples/f8app/pull/14

Reviewed By: hedgerwang

Differential Revision: D3219911

fb-gh-sync-id: eb0b323e2c165c32027fbd00dc6197ad441d6552
fbshipit-source-id: eb0b323e2c165c32027fbd00dc6197ad441d6552

Examples/UIExplorer/UIExplorerActions.js

@@ -1,4 +1,11 @@
 /**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
  * The examples provided by Facebook are for non-commercial testing and
  * evaluation purposes only.
  *
@@ -25,9 +32,7 @@ export type UIExplorerExampleAction = {
   openExample: string;
 };
 
-import type {BackAction} from 'NavigationRootContainer';
-
-export type UIExplorerAction = BackAction | UIExplorerListWithFilterAction | UIExplorerExampleAction;
+export type UIExplorerAction = UIExplorerListWithFilterAction | UIExplorerExampleAction;
 
 function ExampleListWithFilter(filter: ?string): UIExplorerListWithFilterAction {
   return {