Remove INetworkManagementService usage from EthernetTracker. am: 39e7a77991 am: 020d4fa16a am: d21f8fa352

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1925902

Change-Id: I7ea3bb0e97d271a0f6100ae3e602dc6dae522e3d