[ProviderModel] Add InternetAdapter for Wi-Fi network in internet dialog

    - Set each Wi-Fi entry into recycle view
    - Add InternetAdapterTest for unit test

UX design: https://screenshot.googleplex.com/Bniie5mSwm8XXDg.png
Screenshot: https://screenshot.googleplex.com/9rqobLjwkA2whQh.png

Bug: 187779230
Test: atest InternetAdapterTest
Change-Id: I29d2323698920e60eb0b91a5ae45b101f3cb7d68