Use public API instead of hidden API in EthernetTracker am: b19048c433

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1649303

Change-Id: I55ce6d9e45e35629e1b50eed9fb1ea4acb64f564
tree: e7a64133bb05f424754ba0d90f6de04ffe580e78
  1. java/
  2. tests/
  3. .gitignore
  4. Android.bp