Add activities to support voice settings.

Adds Voice Interaction Activities for:
- Do not disturb mode (with interaction)
- Battery Saver mode
- Airplane mode

Change-Id: I4480dc3a30975d94b71714ff58fbeebddfbc1c58
diff --git a/res/layout/voice_interaction.xml b/res/layout/voice_interaction.xml
new file mode 100644
index 0000000..13c4341
--- /dev/null
+++ b/res/layout/voice_interaction.xml
@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2015 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.
+-->
+
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/fragment_root"
+    android:paddingLeft="8dp"
+    android:paddingRight="8dp"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+</FrameLayout>