Pointer Event: touch-action test for two-finger interaction

Tests that a two-finger pan gesture is cancelled in 'touch-action: pan-x pan-y' but is allowed in 'touch-action: pinch-zoom'

1. Touch on Black with two fingers and drag both fingers down at same speed.
2. Tap on Done.
3. Touch on Grey with two fingers and drag both fingers down at same speed.
4. Tap on Done.