Eth Service updates to validate net mgmt calls am: 9c6fd5266e am: 75f6a04e8c

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1934297

Change-Id: Ic887b3229960bee4516066d8199a8a03d714f9d6
tree: fb35f075e0a4327bd2b240444b3fa179c9312d42
  1. service-t/
  2. tests/