Settings: Add icon for WiFi -> Install certificates

res/drawable/ic_certificate.xml

@@ -0,0 +1,25 @@
+<!--
+Copyright (C) 2014 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.
+-->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:height="24dp"
+        android:width="24dp"
+        android:viewportWidth="24"
+        android:viewportHeight="24"
+        android:tint="?android:attr/colorControlNormal">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M4,3C2.89,3 2,3.89 2,5V15A2,2 0 0,0 4,17H12V22L15,19L18,22V17H20A2,2 0 0,0 22,15V8L22,6V5A2,2 0 0,0 20,3H16V3H4M12,5L15,7L18,5V8.5L21,10L18,11.5V15L15,13L12,15V11.5L9,10L12,8.5V5M4,5H9V7H4V5M4,9H7V11H4V9M4,13H9V15H4V13Z" />
+</vector>

res/xml/wifi_configure_settings.xml

@@ -56,6 +56,7 @@
 
     <Preference
         android:key="install_credentials"
+        android:icon="@drawable/ic_certificate"
         android:title="@string/wifi_install_credentials"/>
 
     <Preference