Add support for showing the admin disabling settings.

For settings disabled by user restrictions show
the user a lock icon and allow them to click to
find more info.

Bug: 22543585

Change-Id: Ie8b02ac26f2b22db386a9044f3c6570098f6e14b

src/com/android/settings/PrivacySettings.java

@@ -290,10 +290,6 @@ public class PrivacySettings extends SettingsPreferenceFragment implements Index
             nonVisibleKeys.add(AUTO_RESTORE);
             nonVisibleKeys.add(CONFIGURE_ACCOUNT);
         }
-        if (UserManager.get(context).hasUserRestriction(
-                UserManager.DISALLOW_FACTORY_RESET)) {
-            nonVisibleKeys.add(FACTORY_RESET);
-        }
         if (UserManager.get(context).hasUserRestriction(
                 UserManager.DISALLOW_NETWORK_RESET)) {
             nonVisibleKeys.add(NETWORK_RESET);