Restrict Wi-Fi configuration if settings UI is restricted

- Don't launch W-Fi configuration settings if the settings UI is restricted (including guest users).

Bug: 246301667
Test: manual test
make RunSettingsRoboTests ROBOTEST_FILTER=NetworkProviderSettingsTest

Merged-In: Id82498f41765f955e01bb311bb221d26f9574f31
Change-Id: Id82498f41765f955e01bb311bb221d26f9574f31
(cherry picked from commit aaa65fc6)