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.

react-native-gradle/src/main/java/com/facebook/react/PackageReleaseJsTask.java

@@ -0,0 +1,20 @@
+package com.facebook.react;
+
+import java.io.IOException;
+
+import org.gradle.api.tasks.TaskAction;
+
+/**
+ * Gradle task that copies the prod bundle to the debug build's assets.
+ */
+public class PackageReleaseJsTask extends AbstractPackageJsTask {
+
+  public PackageReleaseJsTask() throws IOException {
+    super(false);
+  }
+
+  @TaskAction
+  public void packageJS() throws Exception {
+    copyBundle();
+  }
+}