This allows the framework to decide whether and when a touch event
sequence arrives to the embedded view. Which gives the framework the
ability to manage hit testing and gesture disambiguation for embedded
UIViews.

We achieve this by wrapping each embedded UIView with another UIView that has
a custom UIGestureRecognizer that delays touch events from being
delivered, and another UIGestureRecognizer that makes sure to let
Flutter know of events that are hit tested to the embedded view.