OffloadUtils - isEthernet() - add support for tun devices

Without this we get:
  I Tethering: Found upstream interface(s): [v4-wlan0]
  E TetherController: isEthernet(v4-wlan0[33]) failure: Unknown hardware address type 65534 on interface v4-wlan0: Address family not supported by protocol

Bug: 153437886
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: Ia6bab67d1a0a36807533a50d4e36a1463496370f
Merged-In: Ia6bab67d1a0a36807533a50d4e36a1463496370f
1 file changed