Trying to detect touch on trackpad on iOS
https://goodnotes.atlassian.net/browse/V5IOSCS-853
Current implementation attempted to use UIScrollView.panGestureRecognizer which seemed to be setup differently than stock UIPanGestureRecognizer.
While scrolling and touch on the trackpad, gesture.state should turn to cancelled.
Both two finger and one finger touch works correctly on Mac, but on iPadOS, only two finger touch works.