state machine fixes

- When supplicant dies, restart it
- When wifimonitor fails to connect in time, restart
  supplicant
- fix dhcp counter reset
- defer all load/unload actions when waiting for supplicant
  control connection
- we dont need to disconnect & reconnect at start with the
  faster monitor connection and handling of failures

Bug: 2973023
Bug: 3090725
Change-Id: I5c834ddd08e6300e2b29da0941a24633825b4d3b