Fix testWifiConfigLockdown on certain devices

On devices with testWifiConfigLockdown = true, the test fails
as it doesn't understand some configurations are auto-created
wpa3-sae variants. Fix the test by skipping configs which are
already auto-removed.

Bug: 209497261
Test: DeviceOwnerTest#testWifiConfigLockdown
Change-Id: Iad200388f1741304dd8b77f786ce872b653de383
1 file changed