Add DC_DHCP_ROAM_FAIL enum in network_stack.proto

DC_DHCP_ROAM_FAIL is used to inidicate that IpClient transits to
StoppingState due to the DHCP roam failure(i.e. receive DHCPNAK
during refreshing IPv4 link address post roam). Also we can see
how often this case happnes in the field by addding a new enum.

Bug: 237350442
Test: build, TH
Change-Id: I03c947aaf49c61238959e55617126a929931e76d
1 file changed
tree: 8e038c1c6258b84f18fe16b7ab7e04e78440ddff
  1. stats/
  2. OWNERS