Modify Wi-Fi network details settings to restricted style

- Show restricted text in guest mode

- Screenshot:
  https://screenshot.googleplex.com/Q5tbzn67EJigpVJ

Bug: 177573895
Test: manual test
make RunSettingsRoboTests
ROBOTEST_FILTER=WifiNetworkDetailsFragment2Test

Change-Id: I64c8d82518d47c7f96802f505efa380c63b9e10c