Merge "Add APIs to support DHCP state changes" into tizen

diff --cc include/common/network-cm-intf.h
Simple merge

diff --cc include/internal/network-dbus-request.h
Simple merge

diff --cc include/internal/network-internal.h
Simple merge

diff --cc src/network-cm-intf.c
Simple merge

diff --cc src/network-dbus-request.c
Simple merge