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This PR force reset forwarding recognizer state when it's stuck at failed state, by recreating the recognizer (we are not able to reset the state back to possible - it has to be reset by UIKit). This is a tricky one since pencil and finger triggers exactly the same callbacks. It turns out that when pencil is involved after finger interaction, the platform view's "forwarding" gesture recognizer is stuck at failed state. This seems to be an iOS bug, because according to [the API doc](https://developer.apple.com/documentation/uikit/uigesturerecognizerstate/uigesturerecognizerstatefailed?language=objc), it should be reset back to "possible" state: > No action message is sent and the gesture recognizer is reset to [UIGestureRecognizerStatePossible](https://developer.apple.com/documentation/uikit/uigesturerecognizerstate/uigesturerecognizerstatepossible?language=objc). However, when iPad pencil is involved, the state is not reset. I tried to KVO the state property, and wasn't able to capture the change. This means the state change very likely happened internally within the recognizer via the backing ivar of the state property. Fixes https://github.com/flutter/flutter/issues/136244 *If you had to change anything in the [flutter/tests] repo, include a link to the migration guide as per the [breaking change policy].* [C++, Objective-C, Java style guides]: https://github.com/flutter/engine/blob/main/CONTRIBUTING.md#style