The two settings in "global" are the ones that Lenovo exposes to me— they're already off and aren't important. I guess the most helpful thing here would be if someone with a non-Lenovo Android tablet could try doing `adb shell settings list system` and `adb shell settings list secure` before and after toggling the Settings ➜ Display ➜ Taskbar option, and diffing the results. (Or just grepping both for "task" and eyeballing it.) However this seems unlikely since again, nobody uses Android tablets