afm-util stop not implemented

afm-util stop $id    is not implemented .

All functions displayed by "afm-util help"   should work.

E.g.:

https://lava.automotivelinux.org/scheduler/job/2529#L1889

should work where we execute / test a simple application install workflow.

( execute https://github.com/montjoie/lava-tests/blob/agl/agl.sh#L169 )