/etc/fonts/conf.d/69-droid-sans-fallback.conf is in fonts-droid 1:4.4.4r2-6.
This file is owned by root:root, with mode 0o777.
It is a symlink to /etc/fonts/conf.d/../conf.avail/69-droid-sans-fallback.conf
/etc/fonts/conf.d/../conf.avail/69-droid-sans-fallback.conf