Build ethernet service into service-connectivity-tiramisu-pre-jarjar. am: 29f7d6230c am: 5324e1f3a3

Original change: https://android-review.googlesource.com/c/platform/frameworks/opt/net/ethernet/+/1956089

Change-Id: I3c8fb541d568d1df9936c3158f38f83eb0b295d3
tree: 543e46a38c3367fd69566a280cd80ea4c8e08ed6
  1. service-t/
  2. tests/