In ea3e3b7 - "Downgrade default notify for WIP reviews" default
notify handling for reviews of changes in WIP state was fixed in
PostReviews.
However ReviewCommand explicitly sets notify to ALL if notify wasn't
specified in the call which circumvents the default notify logic
in PostReviews.
Use the default notify handling in PostReviews for calls to the
"review" ssh command if notify isn't specifed in the call.
Bug: Issue 9880
Change-Id: I63a8b4ce32835055aa7ab5f7a1ca531d9b648ee8
ca58713532