Enable EthernetServiceTests in presubmit am: ef20ec8f12

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1942576

Change-Id: Ia928196c4df79799d1702690fe7226f0cd111fbd
tree: ea0edc37d7c82b8ef9cead5d735d59f3c455abe1
  1. service-t/
  2. tests/