Make wifirouter available on guest

This code is exact copy of wifi router from
cloud-android-containerization repository. Differences:
- include header path
- build files.

Change-Id: I82f978a1bd8242f763386c3afaa24f7439196849
diff --git a/guest/Android.bp b/guest/Android.bp
new file mode 100644
index 0000000..ee8105d
--- /dev/null
+++ b/guest/Android.bp
@@ -0,0 +1,18 @@
+//
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+subdirs = [
+    "commands",
+]