Extract ComponentNameRegistry out of Fabric modules

Summary:
This diff extracts ComponentNameRegistry out of Fabric modules

This is necessary to avoid depending on Fabric and regressing APK size for other RN apps (e.g. IG)

changelog: [internal] internal

Reviewed By: JoshuaGross

Differential Revision: D26765328

fbshipit-source-id: 0a22c4279146f5243473c74a84e78fad7f08f956

ReactAndroid/src/main/java/com/facebook/react/uimanager/ComponentNameResolver.java

@@ -0,0 +1,17 @@
+/*
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+package com.facebook.react.uimanager;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+
+@DoNotStrip
+public interface ComponentNameResolver {
+
+  /* returns a list of all the component names that are registered in React Native. */
+  String[] getComponentNames();
+}