Make intercam_sync option read-only while streaming
Make intercam_sync option read-only while streaming

Change-Id: Icf57b9ed1dda6506a30ca31065c37c8fb9f338d6

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