Currently, users don't know if the wifi description shows "No internet" means it really doesn't have internet access or no internet is because of private DNS resolution failed. So, Add a new description for wifi when private DNS is broken. Bug: 113242081 Test: make -j44 RunSettingsRoboTests \ ROBOTEST_FILTER=WifiDetailPreferenceControllerTest Change-Id: I44a7e51cf76dc3f2a6b9583f226af6649f9b1f5f