[Android] Check all pointers in move events

[m-bert]

Description

When one pointer is placed on the background, handlers don't respond to other pointers. Instead, they fail on this line. This is because on Android events with ACTION_MOVE are batched and all pointers are contained within one event. As Android docs say, actionIndex is fine to check for up and down actions. However, we use it for move action and it always returns 0.

To solve this problem, I've added loop that checks whether any pointer from event is tracked by the handler.

Fixes #3995

Test plan

Tested on example code from #3995

[Copilot]

Pull request overview

Fixes Android multi-touch event routing where ACTION_MOVE batches all pointers but actionIndex stays 0, causing handlers tracking a non-zero pointer to stop receiving move updates (issue #3995).

Changes:

• Update GestureHandler.wantsEvent(MotionEvent) to treat an event as relevant if any pointer in the event is tracked by the handler.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

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[Copilot]

wantsEvent is on a hot path (called for every handler on every MotionEvent). For the MOVE case, (0 until event.pointerCount).any { ... } allocates an iterator/lambda per call. To match the rest of this codebase (e.g. dispatchTouchMoveEvent uses a for loop over pointerCount) and minimize overhead, consider switching this to a plain for loop with an early return true when a tracked pointer is found.

Suggested change

	return if (event.actionMasked == MotionEvent.ACTION_MOVE) {
	(0 until event.pointerCount).any { i ->
	isTrackingPointer(event.getPointerId(i))
	}
	} else {
	isTrackingPointer(event.getPointerId(event.actionIndex))
	if (event.actionMasked == MotionEvent.ACTION_MOVE) {
	val pointerCount = event.pointerCount
	for (i in 0 until pointerCount) {
	if (isTrackingPointer(event.getPointerId(i))) {
	return true
	}
	}
	return false
	} else {
	return isTrackingPointer(event.getPointerId(event.actionIndex))

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated no new comments.

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