Restrict WifiDialogActivity

- Don't show WifiDialogActivity if user has DISALLOW_ADD_WIFI_CONFIG

Fix: 299931761
Bug: 314867581
Flag: None
Test: manual test with TestDPC
atest -c SettingsRoboTests:WifiDialogActivityTest

Change-Id: Icbb8f45922ded163208976be9c2816060dcf09f1
2 files changed