[Wi-Fi] Ignore incorrect user certificates

These incorrect user certificates displayed when users
editing a Wi-Fi network of WPA3-Enterprise in 192bit.

Bug: 149763958
Test: make RunSettingsRoboTests ROBOTEST_FILTER=WifiConfigControllerTest
Change-Id: Idcbc80aa3e945f83ba6b77ebf9ef443398ef8e3c
Merged-In: Iab35ac975933abc54fda83b99a2109d53d6722d4