[automerger skipped] Add EthernetDevice to manage ethernet connection. am: 4d0df88d88 am: b3cd9fad22 -s ours am: 2de11c0389 -s ours am: b0f0e6900f -s ours am: 505a845b0b -s ours

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

Change-Id: Ia6e9bcbe35d1bdfb2d4a18b124e4f166d60f75b2