User management screens

Customized Settings for restricted users
- Only some top-level settings panels available

User management
- Primary user can add and remove users
- User details screen to change name and list of enabled apps

Change-Id: Ia6beb991b427197a4ec2724ca3c9222073f6cf7d

res/xml/user_settings.xml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2012 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.
+-->
+
+<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:settings="http://schemas.android.com/apk/res/com.android.settings"
+        android:title="@string/user_settings_title">
+
+    <PreferenceCategory
+            android:key="user_list"
+            android:title="@string/user_list_title">
+    </PreferenceCategory>
+
+</PreferenceScreen>