dhcp client: create class SocketUtil to simplify class DHCPV4
am: 702e099

* commit '702e09977646efecbdc26eb348031a4ed583161a':
  dhcp client: create class SocketUtil to simplify class DHCPV4

Change-Id: Icbf6cb5a1ada09dd6b032a3a7ac23ea3c96bae45