No you have not been hacked because of this
You uninstalled assistive technologies you say but it pops up in the menu - can you start it?
Or does it open without you doing anything
There are a few things that are automatically restored at boot and that may drag in assistive technologies as a dependency
I have to look through the list for this and I don't find it right now so I can't really tell - I must save it in a safe place