After tinkering with Android TV boxes, a lot of them were void of Accessibility menu in the UI, so such services could not be accessed. Via ADB, I was able to enable apps to use Accessibility by use of settings.
'settings put secure accessibility_enabled 1'
AutoTools could check for the BIND_ACCESSIBILITY_SERVICE in apps, check it's exported service and enable it.
settings put secure enabled_accessibility_services net.dinglisch.android.taskerm/MyAccessibilityService
This has worked on two TV boxes running Android MM.