Camera: Disable TakePicture related messages in stopPreview,stopRecording

This change fixes the race condition and avoid the deadlock
in abnormal snapshot stop I.e, Observed DeadLock when Data
or Notify Callbacks is sent to App after StopPreview is
triggered and so disabling the corresponding take picture messages.

Change-Id: Ifc20e495091c75cc718c24d29db3334fbf7ceb07