fix(android): remove the redundant PageSelectedEvent dispatch causing an ANR on RN 0.72

[igorbej]

This PR removes a redundant PageSelectedEvent dispatch causing an ANR on RN 0.72.

Closes #752

Summary

In the following function:

react-native-pager-view/android/src/fabric/java/com/reactnativepagerview/PagerViewViewManager.kt

Lines 167 to 182 in 2946c1c

	fun goTo(root: NestedScrollableHost?, selectedPage: Int, scrollWithAnimation: Boolean) {
	if (root == null) {
	return
	}
	val view = PagerViewViewManagerImpl.getViewPager(root)
	Assertions.assertNotNull(view)
	val childCount = view.adapter?.itemCount
	val canScroll = childCount != null && childCount > 0 && selectedPage >= 0 && selectedPage < childCount
	if (canScroll) {
	PagerViewViewManagerImpl.setCurrentItem(view, selectedPage, scrollWithAnimation)
	val reactContext = view.context as ReactContext
	UIManagerHelper.getEventDispatcherForReactTag(reactContext, view.id)?.dispatchEvent(
	PageSelectedEvent(view.id, selectedPage)
	)
	}
	}

On the new architecture, using RN 0.72, the event in L178-L180 is dispatched with an incorrect view.id of -1 which apparently trips React Native up causing a silent error leading to an ANR.

One way to fix it is to adjust the ID used with this dispatch, e.g. by replacing view.id with root.id, which contains the correct ID value, which solves the issue.

However, the PagerViewViewManagerImpl.setCurrentItem(...) call in L176 also (implicitly) triggers a PageSelectedEvent dispatch, via the onPageSelected callback:

react-native-pager-view/android/src/fabric/java/com/reactnativepagerview/PagerViewViewManager.kt

Lines 54 to 59 in 2946c1c

	override fun onPageSelected(position: Int) {
	super.onPageSelected(position)
	UIManagerHelper.getEventDispatcherForReactTag(reactContext, host.id)?.dispatchEvent(
	PageSelectedEvent(host.id, position)
	)
	}

Which makes the first dispatch redundant. Hence, this PR removes this dispatch on both architectures (consulted with @troZee).

Test Plan

Test the example app on both architectures and confirm there's no ANR.

Compatibility

OS	Implemented
iOS	❌
Android	✅

Checklist

• I have tested this on a device and a simulator
• I added the documentation in README.md
• I updated the typed files (TS and Flow)