Unable to receive Text Message to CAR Kit(nuvi3580LM)

The problem is when we receive the SetNotificationRegistration,
the MNS thread is not ready yet.so the notification is not enabled.
so we won't send new message notification to Carkit.

bug:10898884

Change-Id: Ibaa4a92694bcbb1ea2fb4e8a3de0ff30acdafeb1