For CA ceritificate we only can install in Network Preferences > Advaned > Install certificates. So we add the option for user to install when you setup the wifi network. After you install the certificate, you can see the certificate in your menu. Bug: 176998563 Test: manual test make RunSettingsRoboTests ROBOTEST_FILTER=WifiConfigController2Test Change-Id: I532b12f9277c6a15c649907fa3711c807566c88e