Release React Native for Android

This is an early release and there are several things that are known
not to work if you're porting your iOS app to Android.

See the Known Issues guide on the website.

We will work with the community to reach platform parity with iOS.

ReactAndroid/src/main/java/com/facebook/react/ReactPackage.java

@@ -0,0 +1,54 @@
+/**
+ * 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;
+
+import java.util.List;
+
+import com.facebook.react.bridge.NativeModule;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.JavaScriptModule;
+import com.facebook.react.uimanager.UIManagerModule;
+import com.facebook.react.uimanager.ViewManager;
+
+/**
+ * Main interface for providing additional capabilities to the catalyst framework by couple of
+ * different means:
+ * 1) Registering new native modules
+ * 2) Registering new JS modules that may be accessed from native modules or from other parts of the
+ * native code (requiring JS modules from the package doesn't mean it will automatically be included
+ * as a part of the JS bundle, so there should be a corresponding piece of code on JS side that will
+ * require implementation of that JS module so that it gets bundled)
+ * 3) Registering custom native views (view managers) and custom event types
+ * 4) Registering natively packaged assets/resources (e.g. images) exposed to JS
+ *
+ * TODO(6788500, 6788507): Implement support for adding custom views, events and resources
+ */
+public interface ReactPackage {
+
+  /**
+   * @param reactContext react application context that can be used to create modules
+   * @return list of native modules to register with the newly created catalyst instance
+   */
+  List<NativeModule> createNativeModules(ReactApplicationContext reactContext);
+
+  /**
+   * @return list of JS modules to register with the newly created catalyst instance.
+   *
+   * IMPORTANT: Note that only modules that needs to be accessible from the native code should be
+   * listed here. Also listing a native module here doesn't imply that the JS implementation of it
+   * will be automatically included in the JS bundle.
+   */
+  List<Class<? extends JavaScriptModule>> createJSModules();
+
+  /**
+   * @return a list of view managers that should be registered with {@link UIManagerModule}
+   */
+  List<ViewManager> createViewManagers(ReactApplicationContext reactContext);
+}