ephemeral newtork WifiConfiguration is only available when saved network. So ephemeral newtork could not have wifi config to config wifi setting. In this situation, making option be not selectable. Bug: 122919564 Test: atest WifiPrivacyPreferenceControllerTest Change-Id: I8a2a1c36ec6d41a6f912da29a8b17bc2e43d9a27