Good question. I doubt it. With FireOS 6, they probably implemented dm-verity, which is system partition integrity checking that's mandatory on recent Android versions. That means any kind of mod to the system partition will prevent the device fro...
sudo setfattr -n security.selinux -v "u:object_r:system_file:s0" FILENAME
Most Ubuntu systems come with selinux installed, so it might be easier to just do chcon u:object_r:system_file:s0 FILENAME.
P.S. How did you find out which test points...
Is it just me or did they decide to do something completely different with the phones Honor gave them?