Fabric: Unsetting FormsStackingContext trait for `ParagraphShadowNo…

…de` on Android

Summary:
Unsetting `FormsStackingContext` trait is essential on Android where we can't mount views inside `TextView`.

Changelog: [Internal] Fabric-specific internal change.

Reviewed By: mdvacca

Differential Revision: D20268038

fbshipit-source-id: e754bf1631a0c3147694fb6b34bb1d9e78148894

ReactCommon/fabric/components/text/paragraph/ParagraphShadowNode.h

@@ -42,6 +42,13 @@ class ParagraphShadowNode : public ConcreteViewShadowNode<
     auto traits = ConcreteViewShadowNode::BaseTraits();
     traits.set(ShadowNodeTraits::Trait::LeafYogaNode);
     traits.set(ShadowNodeTraits::Trait::TextKind);
+
+#ifdef ANDROID
+    // Unsetting `FormsStackingContext` trait is essential on Android where we
+    // can't mount views inside `TextView`.
+    traits.unset(ShadowNodeTraits::Trait::FormsStackingContext);
+#endif
+
     return traits;
   }