/usr/lib/OpenNI2/Drivers/libDummyDevice.so is in libopenni2-dev 2.2.0.33+dfsg-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/OpenNI2/Drivers/libDummyDevice.so.0
/usr/lib/OpenNI2/Drivers/libDummyDevice.so.0