Copy alreadyAppliedPadding when cloning SafeAreaViewShadowNode

Summary:
Changelog: [Internal]

`SafeAreaViewShadowNode.alreadyAppliedPadding` was always {0, 0, 0, 0} because value of previous shadow node was never copied over to new shadow node during clone.

Reviewed By: shergin

Differential Revision: D21617361

fbshipit-source-id: 6d6c91b19ff60271bf7c48145d85faaee0321680

ReactCommon/fabric/components/safeareaview/SafeAreaViewShadowNode.cpp

@@ -12,5 +12,13 @@ namespace react {
 
 extern const char SafeAreaViewComponentName[] = "SafeAreaView";
 
+SafeAreaViewShadowNode::SafeAreaViewShadowNode(
+    ShadowNode const &sourceShadowNode,
+    ShadowNodeFragment const &fragment)
+    : ConcreteViewShadowNode(sourceShadowNode, fragment),
+      alreadyAppliedPadding(
+          static_cast<SafeAreaViewShadowNode const &>(sourceShadowNode)
+              .alreadyAppliedPadding) {}
+
 } // namespace react
 } // namespace facebook

ReactCommon/fabric/components/safeareaview/SafeAreaViewShadowNode.h

@@ -29,6 +29,10 @@ class SafeAreaViewShadowNode final : public ConcreteViewShadowNode<
 
  public:
   EdgeInsets alreadyAppliedPadding{};
+
+  SafeAreaViewShadowNode(
+      ShadowNode const &sourceShadowNode,
+      ShadowNodeFragment const &fragment);
 };
 
 } // namespace react