Fix Shimmer in Fabric Android

Summary: ShimmeringView is called: RTShimmeringView Android and ShimmeringView in iOS. This diff adds a mapping into ComponentDescriptorRegistry to temporary enable ShimmeringView component until we can unify names in JS.

Reviewed By: sahrens

Differential Revision: D12991351

fbshipit-source-id: 48e08b8021116221ccfd5f2512c76f65145baa2a

ReactCommon/fabric/uimanager/ComponentDescriptorRegistry.cpp

@@ -64,6 +64,10 @@ static const std::string componentNameByReactViewName(std::string viewName) {
     return "ScrollView";
   }
 
+  if (viewName == "RKShimmeringView") {
+    return "ShimmeringView";
+  }
+
   if (viewName == "AndroidProgressBar") {
     return "ActivityIndicatorView";
   }