Settings: Add preference to enable/disable assisted GPS.

Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/res/xml/security_settings.xml b/res/xml/security_settings.xml
index 8dd9d89..5b90dba 100644
--- a/res/xml/security_settings.xml
+++ b/res/xml/security_settings.xml
@@ -33,6 +33,12 @@
             android:summaryOff="@string/location_gps_disabled"/>
 
         <CheckBoxPreference
+            android:key="assisted_gps"
+            android:title="@string/assisted_gps"
+            android:summaryOn="@string/assisted_gps_enabled"
+            android:summaryOff="@string/assisted_gps_disabled"/>
+
+        <CheckBoxPreference
             android:key="use_location"
             android:title="@string/use_location_title"
             android:persistent="false"