Make RootViewGestureHandler handler cancel awaiting gestures

[j-piasecki]

Description

Gesture Handler is handling calls to requestDisallowInterceptTouchEvent by canceling all gestures:

react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerRootHelper.kt

Lines 90 to 94 in 5523506

	if (orchestrator != null && !passingTouch) {
	// if we are in the process of delivering touch events via GH orchestrator, we don't want to
	// treat it as a native gesture capturing the lock
	tryCancelAllHandlers()
	}

This is done by activating a root handler that should, in turn, cancel other gestures:

react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerRootHelper.kt

Lines 109 to 114 in 5523506

	jsGestureHandler?.apply {
	if (state == GestureHandler.STATE_BEGAN) {
	// Try activate main JS handler
	activate()
	end()
	}

There is a case where this doesn't currently work: when gesture A waits for gesture B and root view is activated, gesture B gets canceled but gesture A is not due to this check:

react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/core/GestureHandlerOrchestrator.kt

Lines 692 to 698 in 5523506

	return if (handler !== other &&
	(handler.isAwaiting || handler.state == GestureHandler.STATE_ACTIVE)
	) {
	// in every other case as long as the handler is about to be activated or already in active
	// state, we delegate the decision to the implementation of GestureHandler#shouldBeCancelledBy
	handler.shouldBeCancelledBy(other)
	} else true

Since handler A is awaiting, it doesn't get canceled. Gesture B does get canceled, which in turn causes gesture A to activate, effectively making it ignore the cancellation.

This happens because of this method:

react-native-gesture-handler/android/src/main/java/com/swmansion/gesturehandler/react/RNGestureHandlerInteractionManager.kt

Lines 52 to 58 in 5523506

	override fun shouldHandlerBeCancelledBy(handler: GestureHandler<*>, otherHandler: GestureHandler<*>): Boolean {
	if (otherHandler is NativeViewGestureHandler) {
	return otherHandler.disallowInterruption
	}
	return false
	}

which will always return false if the activating gesture is root view.

This PR makes it so that if the activating gesture is the root handler, shouldHandlerBeCancelledBy will always return true, canceling the waiting gesture.

Fixes #2870

Test plan

Tested on the example app and the reproducer from the issue