test: split 3-finger tap-and-drag test
Split out into a btntool test and a true three-finger test. For consistency, check the number of slots on all those tests rather than having litest-device-specific exclusions. Signed-off-by:Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by:
Hans de Goede <hdegoede@redhat.com>