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/ReactBridge.java

@@ -0,0 +1,71 @@
+/**
+ * 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 javax.annotation.Nullable;
+
+import android.content.res.AssetManager;
+
+import com.facebook.react.bridge.queue.MessageQueueThread;
+import com.facebook.jni.Countable;
+import com.facebook.proguard.annotations.DoNotStrip;
+import com.facebook.soloader.SoLoader;
+
+/**
+ * Interface to the JS execution environment and means of transport for messages Java<->JS.
+ */
+@DoNotStrip
+public class ReactBridge extends Countable {
+
+  /* package */ static final String REACT_NATIVE_LIB = "reactnativejni";
+
+  static {
+    SoLoader.loadLibrary(REACT_NATIVE_LIB);
+  }
+
+  private final ReactCallback mCallback;
+  private final JavaScriptExecutor mJSExecutor;
+  private final MessageQueueThread mNativeModulesQueueThread;
+
+  /**
+   * @param jsExecutor the JS executor to use to run JS
+   * @param callback the callback class used to invoke native modules
+   * @param nativeModulesQueueThread the MessageQueueThread the callbacks should be invoked on
+   */
+  public ReactBridge(
+      JavaScriptExecutor jsExecutor,
+      ReactCallback callback,
+      MessageQueueThread nativeModulesQueueThread) {
+    mJSExecutor = jsExecutor;
+    mCallback = callback;
+    mNativeModulesQueueThread = nativeModulesQueueThread;
+    initialize(jsExecutor, callback, mNativeModulesQueueThread);
+  }
+
+  @Override
+  public void dispose() {
+    mJSExecutor.close();
+    mJSExecutor.dispose();
+    super.dispose();
+  }
+
+  private native void initialize(
+      JavaScriptExecutor jsExecutor,
+      ReactCallback callback,
+      MessageQueueThread nativeModulesQueueThread);
+  public native void loadScriptFromAssets(AssetManager assetManager, String assetName);
+  public native void loadScriptFromNetworkCached(String sourceURL, @Nullable String tempFileName);
+  public native void callFunction(int moduleId, int methodId, NativeArray arguments);
+  public native void invokeCallback(int callbackID, NativeArray arguments);
+  public native void setGlobalVariable(String propertyName, String jsonEncodedArgument);
+  public native boolean supportsProfiling();
+  public native void startProfiler(String title);
+  public native void stopProfiler(String title, String filename);
+}