Add a standalone SkyShell.apk for testing

sky/shell/apk/src/org/domokit/sky/shell/SkyShellActivity.java

Index: sky/shell/apk/src/org/domokit/sky/shell/SkyShellActivity.java
diff --git a/sky/shell/apk/src/org/domokit/sky/shell/SkyShellActivity.java b/sky/shell/apk/src/org/domokit/sky/shell/SkyShellActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..a38d83e9ebaf75972c457aee7e63350aa8385cde
--- /dev/null
+++ b/sky/shell/apk/src/org/domokit/sky/shell/SkyShellActivity.java
@@ -0,0 +1,24 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.domokit.sky.shell;
+
+import android.app.Activity;
+import android.os.Bundle;
+
+/**
+ * Main activity for SkyShell.
+ */
+public class SkyShellActivity extends Activity {
+    /**
+     * @see android.app.Activity#onCreate(android.os.Bundle)
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        SkyMain.ensureInitialized(this);
+        SkyMain.start();
+    }
+}