Hide unsupported lab prefs on phones

Change-Id: Iec2fd0a99595de707b6b70f77abb3468ca347ab5
diff --git a/res/xml-xlarge/lab_preferences.xml b/res/xml-xlarge/lab_preferences.xml
new file mode 100644
index 0000000..87383b0
--- /dev/null
+++ b/res/xml-xlarge/lab_preferences.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2008 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" >
+
+    <CheckBoxPreference
+        android:key="enable_quick_controls"
+        android:defaultValue="false"
+        android:title="@string/pref_lab_quick_controls"
+        android:summary="@string/pref_lab_quick_controls_summary" />
+
+    <CheckBoxPreference
+        android:key="use_most_visited_homepage"
+        android:defaultValue="false"
+        android:title="@string/pref_lab_most_visited_homepage"
+        android:summary="@string/pref_lab_most_visited_homepage_summary" />
+
+    <CheckBoxPreference
+        android:key="use_instant_search"
+        android:defaultValue="false"
+        android:title="@string/pref_use_instant_search"
+        android:summary="@string/pref_use_instant_search_summary" />
+</PreferenceScreen>