[CP-stable] Fix BaseTapAndDragGestureRecognizer should reset drag state after losing gesture arena (#151989)#153935
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…sing gesture arena (flutter#151989) This PR properly resets the drag state when losing the gesture arena or when the recognizer stops tracking the current pointer. The _dragState enum was reset properly, but I had forgotten to also reset the `_start`, this caused an issue when the recognizer won the gesture arena the next time, as it tries to detect a drag given the old `_start` in `acceptGesture`, but the `_dragState` has been reset causing an assertion to trigger.
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CP LGTM 👍 Should be very low risk.
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…drag state after losing gesture arena (#151989) (flutter/flutter#153935)
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…drag state after losing gesture arena (#151989) (flutter/flutter#153935)
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Fixes an issue where Flutter TextField may crash on iOS after a horizontal drag that does not meet the drag threshold to win the gesture arena, leaving the TextField in a weird state that does not accept tap gestures.
Fixes #153939
Cherry-pick of: #151989
Related issue: #153458