MAP: Synchronize notifcationReg reply and MNS connect action.

Use Case:
1. Connect to carkit
2. Disconnect connection with carkit.
3. Reconnect to carkit

MNS Failure during Reconnection.
User will in some timing conditions not get notification
of new messages and then turns OFF/ON the carkit.
MAS is connected fine but for MNS car sends BAD REQUEST.

Root Cause:
This isssue is reported only with one particular carkit in MCE role,
where in MNS Connect request issued before acknowleding
the setNotificationReg Request.

Synchronize handleRegistration method in handler thread to ensure
setNotificationReg response from MSE is sent before requesting
a MNS Connect to MCE.

Change-Id: I30559c643af7733754fce551b97e31543a0cb160
2 files changed