Move SnapshotView to SnapshotViewIOS and create an unimplemented android version

Reviewed By: @andreicoman11

Differential Revision: D2536373

fb-gh-sync-id: 0f671e8198175a15540b74d54e53eee941aa0c1b

Examples/UIExplorer/UIExplorerList.ios.js

@@ -19,7 +19,7 @@ var React = require('react-native');
 var {
   AppRegistry,
   Settings,
-  SnapshotView,
+  SnapshotViewIOS,
   StyleSheet,
 } = React;
 
@@ -85,9 +85,9 @@ COMPONENTS.concat(APIS).forEach((Example) => {
       render: function() {
         var Renderable = UIExplorerListBase.makeRenderable(Example);
         return (
-          <SnapshotView>
+          <SnapshotViewIOS>
             <Renderable />
-          </SnapshotView>
+          </SnapshotViewIOS>
         );
       },
     });