I am trying to follow this tutorial: https://spin.atomicobject.com/2018/08/27/custom-gboard-sticker-pack/
However I am failing at Step 3, because I cannot extend my subclass from JobIntentService. I get the Error Message Cannot resolve symbol 'JobIntentService'. I found people getting similar error messages, but I couldn't follow their solutions, as it expected prerequisite knowledge I don't have. All I ever did in Android Programming is the steps in the tutorial.