Add support for Ethernet tethering

Ethernet tethering can be started via
startTethering(TETHERING_ETHERNET).

Test: flashed, enabled ethernet tethering, verified internet access on
      downstream.
Bug: 130840861

Change-Id: I34842acd94b972e440c3622f7617df10c18acf65
1 file changed
tree: 5fb0bd27279641204c85bda443be21692a4be3fe
  1. core/
  2. packages/
  3. services/
  4. wifi/