/usr/lib/libXnDeviceSensorV2.so is in libopenni-sensor-primesense-dev 5.1.0.41-5.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libXnDeviceSensorV2.so.0
/usr/lib/libXnDeviceSensorV2.so.0