Remove the check hasMultipleUsers in Settings.

When deciding to show the user section or not, Just rely
on supportsMultipleUsers. Don't check hasMultipleUsers.

BUG:21119929
Change-Id: Ifbddac10e2f6dc02b8e2e55b41ab9f5be018dfca

src/com/android/settings/users/UserSettings.java

@@ -200,7 +200,7 @@ public class UserSettings extends SettingsPreferenceFragment
         final Context context = getActivity();
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
         boolean hasMultipleUsers = mUserManager.getUserCount() > 1;
-        if ((!UserManager.supportsMultipleUsers() && !hasMultipleUsers)
+        if ((!UserManager.supportsMultipleUsers())
                 || Utils.isMonkeyRunning()) {
             mEnabled = false;
             return;