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/bridge/ReadableNativeArray.java

@@ -0,0 +1,47 @@
+/**
+ * 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;
+import com.facebook.soloader.SoLoader;
+
+/**
+ * Implementation of a NativeArray that allows read-only access to its members. This will generally
+ * be constructed and filled in native code so you shouldn't construct one yourself.
+ */
+@DoNotStrip
+public class ReadableNativeArray extends NativeArray implements ReadableArray {
+
+  static {
+    SoLoader.loadLibrary(ReactBridge.REACT_NATIVE_LIB);
+  }
+
+  @Override
+  public native int size();
+  @Override
+  public native boolean isNull(int index);
+  @Override
+  public native boolean getBoolean(int index);
+  @Override
+  public native double getDouble(int index);
+  @Override
+  public native String getString(int index);
+  @Override
+  public native ReadableNativeArray getArray(int index);
+  @Override
+  public native ReadableNativeMap getMap(int index);
+  @Override
+  public native ReadableType getType(int index);
+
+  @Override
+  public int getInt(int index) {
+    return (int) getDouble(index);
+  }
+}