camera: Place Panorama support under xml property control.

Change-Id: I88eb3cc709f40f65588a25966fc6c5d8204ad086
Reviewed-on: http://git-master/r/365680
Reviewed-by: Frank Chen <frankc@nvidia.com>
Tested-by: Frank Chen <frankc@nvidia.com>
Reviewed-by: Philip Breczinski <pbreczinski@nvidia.com>
Reviewed-by: Jean Huang <jeanh@nvidia.com>
Reviewed-by: Peter Zu <pzu@nvidia.com>