[automerger skipped] Add EthernetDevice to manage ethernet connection. am: 4d0df88d88 am: b3cd9fad22 -s ours am: 2de11c0389 -s ours

am skip reason: Change-Id I73fe44be3790bdba5a6059fbba3f7264b21eed99 with SHA-1 042672729c is in history

Change-Id: I1e9b3840616e82edf4dfe3f4dc664fc034004caa