add UIExplorer example of SwipeableListView

Summary:
Q: Explain the **motivation** for making this change. What existing problem does the pull request solve?

A: There is no example for [`SwipeableListView`](https://github.com/facebook/react-native/tree/master/Libraries/Experimental/SwipeableRow) component, it would be helpful to add one.

**Test plan (required)**

Some screenshots here:

<img width="377" alt="screen shot 2016-07-14 at 21 47 50" src="https://cloud.githubusercontent.com/assets/1091472/16841629/af8392c4-4a0c-11e6-9f92-208aba514f36.png">

Tested on:

1. Simulators

    iPhone 4s, 5, 5s, 6, 6 Plus
Closes https://github.com/facebook/react-native/pull/8782

Differential Revision: D3624365

fbshipit-source-id: 76598ac69bca1dca6ae928d2d19c9f1384d8e161

Examples/UIExplorer/js/UIExplorerList.android.js

@@ -74,6 +74,10 @@ var ComponentExamples: Array<UIExplorerExample> = [
     key: 'StatusBarExample',
     module: require('./StatusBarExample'),
   },
+  {
+    key: 'SwipeableListViewExample',
+    module: require('./SwipeableListViewExample')
+  },
   {
     key: 'SwitchExample',
     module: require('./SwitchExample'),