soc: qcom: service-notifier: update state after queuing notification

On establishing a connection with the remote service and being notified
of a service's current state for the first time, first queue the service
notification for the new state. Only then, update the current state of
the service notifier.

Also, to prevent a premature update of the service notifier state,
remove the state update from send_notif_listener_msg_req.

Change-Id: I43288b1ae23081721a9baef5a5098891afd8ff64
Signed-off-by: David Keitel <dkeitel@codeaurora.org>