avoid the multiple typeof calls since this is a hot codepath

https://github.com/facebook/react/pull/32119/files/ca657bf1104f5a56f7945a4c298c9d680e2da151#r1935647034

Author: hannojg

packages/react-native-renderer/src/ReactNativeAttributePayloadFabric.js

@@ -494,21 +494,22 @@ function fastAddProperties(
       } else {
         continue;
       }
-    } else if (
-      typeof attributeConfig === 'object' &&
-      typeof attributeConfig.process === 'function'
-    ) {
-      // An atomic prop with custom processing.
-      newValue = attributeConfig.process(prop);
-    } else if (typeof prop === 'function') {
-      // A function prop. It represents an event handler. Pass it to native as 'true'.
-      newValue = true;
-    } else if (typeof attributeConfig !== 'object') {
-      // An atomic prop. Doesn't need to be flattened.
-      newValue = prop;
-    } else if (typeof attributeConfig.diff === 'function') {
-      // An atomic prop with custom diffing. We don't need to do diffing when adding props.
-      newValue = prop;
+    } else if (typeof attributeConfig === 'object') {
+      if (typeof attributeConfig.process === 'function') {
+        // An atomic prop with custom processing.
+        newValue = attributeConfig.process(prop);
+      } else if (typeof attributeConfig.diff === 'function') {
+        // An atomic prop with custom diffing. We don't need to do diffing when adding props.
+        newValue = prop;
+      }
+    } else {
+      if (typeof prop === 'function') {
+        // A function prop. It represents an event handler. Pass it to native as 'true'.
+        newValue = true;
+      } else {
+        // An atomic prop. Doesn't need to be flattened.
+        newValue = prop;
+      }
     }
 
     if (newValue !== undefined) {