tree a6060fb137dba9d4f2c14437e08f3917523cca29
parent 9c32d89aaab7bf5a5b7473132c92c86769f9519e
author Arc Wang <arcwang@google.com> 1585554477 +0800
committer Arc Wang <arcwang@google.com> 1585575000 +0800

[Wi-Fi] Index Wi-Fi preferences.

This is a WifiTracker2 version of partial part of ag/9980423

- Disable the "Saved network" if the access points is empty.
- Disable the "Wifi data usage" if there is no wifi radio.

Bug: 146823365
Test: manual
      Search 'Saved networks' when there is a saved Wi-Fi network
      and when there is no saved Wi-Fi network.
      Search 'data usage' on the device which supports Wi-Fi and
      on the device which does not supports Wi-Fi.
Change-Id: If46e65585f1b272401666f78fd5e3a4cf49bef6e