[DO NOT MERGE] Modify Wi-Fi details settings to restricted style

- Show restricted text in guest mode

- Screenshot:
  https://screenshot.googleplex.com/6nYcmazMM46TxaB

Bug: 177573895
Test: manual test
make RunSettingsRoboTests \
       ROBOTEST_FILTER=WifiNetworkDetailsFragmentTest

Change-Id: I5f857b2079e0f550e4be601d27dd54dac56b2f57
(cherry picked from commit d4cec9b6)