Add skeleton Android app: remoting_host_apk

remoting/android/host/src/org/chromium/chromoting/host/MainActivity.java

Index: remoting/android/host/src/org/chromium/chromoting/host/MainActivity.java
diff --git a/remoting/android/host/src/org/chromium/chromoting/host/MainActivity.java b/remoting/android/host/src/org/chromium/chromoting/host/MainActivity.java
new file mode 100644
index 0000000000000000000000000000000000000000..59c991bf622f530f5559bd6284b611625baa7db1
--- /dev/null
+++ b/remoting/android/host/src/org/chromium/chromoting/host/MainActivity.java
@@ -0,0 +1,24 @@
+// Copyright 2016 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.chromium.chromoting.host;
+
+import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
+import android.support.v7.widget.Toolbar;
+
+/**
+ * Main screen of the Chromoting Host application.
+ */
+public class MainActivity extends AppCompatActivity {
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+
+        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
+    }
+}