[automerger skipped] ethernet: stop using EthernetManager shims am: 81b4b38067 -s ours

am skip reason: Merged-In Ia38f3b86a70ccfd06a8c17392fbbb1586ed6bb7e with SHA-1 b4a86b9181 is already in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/18728709

Change-Id: Ic308248d8ed63034a08fbc6b17db4c80b7384791
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>