I have a Pixel. The Pixel Launcher that comes stock on the phone has a Google search thing that is not removable except via switching to another launcher. It looks like a widget, but you can’t remove it. It exists on every “panel” of the screen, below the app shortcuts.
I do use it quite a bit when making searches, but only because it’s there already and can’t be removed. If I could remove it, I would.
I’m not OP, but generally the term is machine learning engineer. You get a computer science degree with a focus in ML.
The jobs are fairly plentiful as lots of places are looking to hire AI people now.