This is tool for Benesse tablets, with less bloats than original.

Install apk, using adb or PackageInstaller. Running those two adb commands are recommended as some features are limited without it.

adb shell pm grant com.saradabar.cpadcustomizetool android.permission.WRITE_SECURE_SETTINGS
adb shell dpm set-device-owner com.saradabar.cpadcustomizetool/.Receiver.AdministratorReceiver