Handle unexpected interface up/down events

WEXT on crespo has an issue where the interface up/down events
can happen in an unexpected fashion.

At a driver start, we can go from interface disabled to interface enabled,
back to interface disabled and then eventually into an interface enabled state.

Earlier, we were just expecting a single interface enable event that would trigger
driver specific commands. Now, we just handle these events as individual driver
stop and driver start situations so that we do appropriate things eventually

Bug: 5239853
Change-Id: I6bd5d844edf9fadfdca4e8eb753c2ba738aa6ad5