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/uimanager/SimpleViewManager.java

@@ -0,0 +1,36 @@
+/**
+ * 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.uimanager;
+
+import android.view.View;
+
+/**
+ * A partial implementation of {@link ViewManager} that applies common properties such as background
+ * color, opacity and CSS layout. Implementations should make sure to call
+ * {@code super.updateView()} in order for these properties to be applied.
+ *
+ * @param <T> the view handled by this manager
+ */
+public abstract class SimpleViewManager<T extends View> extends ViewManager<T, ReactShadowNode> {
+
+  @Override
+  public ReactShadowNode createCSSNodeInstance() {
+    return new ReactShadowNode();
+  }
+
+  @Override
+  public void updateView(T root, CatalystStylesDiffMap props) {
+    BaseViewPropertyApplicator.applyCommonViewProperties(root, props);
+  }
+
+  @Override
+  public void updateExtraData(T root, Object extraData) {
+  }
+}