move @ReactMethod to the codegen'ed class so impl class don't need it anymore

Reviewed By: javache

Differential Revision: D5074121

fbshipit-source-id: 1b23a5d26ffe27c5093677ae7ecca424b232c8aa

ReactAndroid/src/main/java/com/facebook/react/bridge/ReactModuleWithSpec.java

@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) 2015-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.
+ */
+
+package com.facebook.react.bridge;
+
+import com.facebook.proguard.annotations.DoNotStrip;
+
+/**
+ * An interface to be implemented by react modules that extends from the
+ * generated spec class.
+ * This is experimental.
+ */
+@DoNotStrip
+public interface ReactModuleWithSpec {
+}