Add Inter-cam HW sync option to C# wrapper
Add Inter-cam HW sync option to C# wrapper

Change-Id: Ib21f112acbc789b04e159cef8b31967fe86fbf20

IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense,IntelRealSense/librealsense