[automerger skipped] Add EthernetDevice to manage ethernet connection. am: 4d0df88d88 -s ours am: f3f4f9f021 -s ours am: b6d0b82aa6 -s ours

am skip reason: Change-Id I73fe44be3790bdba5a6059fbba3f7264b21eed99 with SHA-1 4d0df88d88 is in history

Change-Id: I3466f1b2b8fd6b942d91c02e239bd3585e284d8b