Add Tests for EthernetNetworkFactory am: e78e8828d6 am: f5e25fcc5d am: 98958bbabf

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1486182

Change-Id: I6ebceef181faf9088b766abf78a9b12c10be30a2
tree: 82501b274b4859d3bcf1d3c5ad49f7071dc9dc7f
  1. service-t/
  2. tests/