[IOT-1469] Fix MOT build issues for Windows

[IOT-1469] Fix MOT build issues for Windows

- Added new .def file for MOT exports
- Fixed samples to use public APIs
- Updated PreconfigPin API names to align

Change-Id: Ib9b473b8b70eed243c8a7dbbd19e27eaa49a4edd
Signed-off-by: Alex Kelley <alexke@microsoft.com>
Reviewed-on: https://gerrit.iotivity.org/gerrit/13921
Tested-by: jenkins-iotivity <jenkins-iotivity@opendaylight.org>
Reviewed-by: Soemin Tjong <stjong@microsoft.com>
Reviewed-by: David Antler <david.a.antler@intel.com>
Reviewed-by: Kevin Kane <kkane@microsoft.com>
Reviewed-by: Dave Thaler <dthaler@microsoft.com>
Reviewed-by: Chul Lee <chuls.lee@samsung.com>
Reviewed-by: Randeep Singh <randeep.s@samsung.com>