Update Internet Settings layout

- Add catagory names
  - Mobile data
  - Wi-Fi
  - Networks

- Move the Wi-Fi switch and the connected Wi-Fi network to Wi-Fi catagory

Bug: 405256017
Bug: 406549814
Flag: EXEMPT bugfix
Test: Manual testing
  atest NetworkProviderSettingsTest
  atest InternetResetHelperTest \
        WifiSwitchPreferenceTest \
        WifiCategoryTest

NO_IFTTT=Wi-Fi switch title string updated

Change-Id: Ia5446d3071f798e67c3b89b8147a95a027918c7a