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

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

Change-Id: I806e1f57f9d94643166558624546ea2cab6ad752