/usr/share/aptdaemon/tests/dpkg-wrapper.sh is in python3-aptdaemon.test 1.1.1+bzr982-0ubuntu14.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 | #!/bin/sh
exec /usr/bin/fakeroot /usr/bin/dpkg $*
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