When resolving borders, respect leading/trailing semantics before left/right

Summary:
Changelog: [Internal]

When resolving borders, leading/trailing semantics should take priority over left/right.

Reviewed By: shergin

Differential Revision: D20422951

fbshipit-source-id: 7a464c88f881a77732929a155aaa9b2e150bba74

ReactCommon/fabric/components/view/primitives.h

@@ -109,9 +109,9 @@ struct CascadedRectangleCorners {
         /* .topRight = */
         topRight.value_or(topTrailing.value_or(all.value_or(defaults))),
         /* .bottomLeft = */
-        bottomLeft.value_or(topLeading.value_or(all.value_or(defaults))),
+        bottomLeft.value_or(bottomLeading.value_or(all.value_or(defaults))),
         /* .bottomRight = */
-        bottomRight.value_or(topTrailing.value_or(all.value_or(defaults))),
+        bottomRight.value_or(bottomTrailing.value_or(all.value_or(defaults))),
     };
   }