Remount children in scrollView if layout changes

Summary: changelog: [internal]

Reviewed By: hramos

Differential Revision: D30603617

fbshipit-source-id: bc189d4a0a997202e6b2cd5314b997395bcdf7b2

Author: sammy-SC

React/Fabric/Mounting/ComponentViews/ScrollView/RCTScrollViewComponentView.mm

@@ -133,6 +133,15 @@ - (void)dealloc
   [self.scrollViewDelegateSplitter removeAllDelegates];
 }
 
+- (void)layoutSubviews
+{
+  [super layoutSubviews];
+
+  if (_subviewClippingEnabled) {
+    [self _remountChildren];
+  }
+}
+
 - (RCTGenericDelegateSplitter<id<UIScrollViewDelegate>> *)scrollViewDelegateSplitter
 {
   return ((RCTEnhancedScrollView *)_scrollView).delegateSplitter;