Implementation of Eth Service updateConfiguration am: 947b8f0a08 am: 6f9f55b9b7 am: 5f41931cd9

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1935157

Change-Id: Ic282685c1b6638cd3c76aac3329627006fbb84fa
tree: ae91358392d113d6c82ab159d8490ab7263df7a1
  1. service-t/
  2. tests/