VirtualView: Fix Window Focus Detection Cleanup (#52621)

Summary:
Pull Request resolved: #52621

In D77261958, I made a typo when implementing the cleanup of window focus detection in `onDetachedFromWindow`. This fixes it.

Changelog:
[Internal]

Reviewed By: mdvacca

Differential Revision: D78366506

fbshipit-source-id: 2a377cd7e8ec08f0c899dbd9cb3757bec580d30f

Author: yungsters

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/virtual/view/ReactVirtualView.kt

@@ -101,7 +101,7 @@ public class ReactVirtualView(context: Context) :
     ReactScrollViewHelper.removeScrollListener(this)
     ReactScrollViewHelper.removeLayoutChangeListener(this)
     if (detectWindowFocus) {
-      viewTreeObserver.addOnWindowFocusChangeListener(onWindowFocusChangeListener)
+      viewTreeObserver.removeOnWindowFocusChangeListener(onWindowFocusChangeListener)
     }
     cleanupLayoutListeners()
   }