Enable prop diffing for <View> (#45551)

Summary:
Pull Request resolved: #45551

This diffs toggles the new Android prop diffing mechanism for <View> components

changelog: [internal] internal

Reviewed By: sammy-SC

Differential Revision: D59613243

fbshipit-source-id: 79c1e4bf4f5a67fc516e5db7b9f4ffba0cb9b69b

packages/react-native/ReactAndroid/src/main/jni/react/fabric/FabricMountingManager.cpp

@@ -220,6 +220,17 @@ static inline float scale(Float value, Float pointScaleFactor) {
 jni::local_ref<jobject> FabricMountingManager::getProps(
     const ShadowView& oldShadowView,
     const ShadowView& newShadowView) {
+  auto componentName = newShadowView.componentName;
+  // We calculate the diffing between the props of the last mounted ShadowTree
+  // and the Props of the latest commited ShadowTree). ONLY for <View>
+  // components when the "enablePropsUpdateReconciliationAndroid" feature flag
+  // is enabled.
+  if (ReactNativeFeatureFlags::enablePropsUpdateReconciliationAndroid() &&
+      strcmp(componentName, "View") == 0) {
+    const Props* oldProps = oldShadowView.props.get();
+    auto diffProps = newShadowView.props->getDiffProps(oldProps);
+    return ReadableNativeMap::newObjectCxxArgs(diffProps);
+  }
   return ReadableNativeMap::newObjectCxxArgs(newShadowView.props->rawProps);
 }