Merge "Marking eth network management APIs @SystemApi" am: 6db38c75b0

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1969839

Change-Id: Ie76ba54b9339398ed961a02435b17fbb75218106
tree: 0684cdcf2ddfbfc8e259b4ab75b79eed6c8229f7
  1. framework/
  2. framework-t/
  3. service-t/
  4. services/
  5. tests/