[automerger skipped] ethernet: add test for removing interface while in server...

[automerger skipped] ethernet: add test for removing interface while in server mode am: edb331fc -s ours

am skip reason: Merged-In I3ca71cd87301da8e96d31f7632b69d318ee97d4a with SHA-1 f34945bf is already in history

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Connectivity/+/2254695



Change-Id: Ie4cc30d04e4bb734e3b77e96d651493a1da2808f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>