Add codegen support for DimensionValue for components (#35953)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/35953

DimensionValue is a reserved prop type that can be a number or string (such as '50%'). On Java, it will get converted to a YogaValue (converter added to this diff); on C++ it will get converted to a YGValue (converter already exists as it's used in Fabric).

Changelog:
[Internal][Added] - Add codegen support for DimensionValue for components

Reviewed By: cipolleschi

Differential Revision: D42650799

fbshipit-source-id: 1d2bc30bbd93837dedbbb4c74f814963c8140957

packages/react-native-codegen/src/generators/components/GeneratePropsJavaPojo/serializePojo.js

@@ -23,6 +23,7 @@ function toJavaType(
   const importReadableMap = () =>
     addImport('com.facebook.react.bridge.ReadableMap');
   const importArrayList = () => addImport('java.util.ArrayList');
+  const importYogaValue = () => addImport('com.facebook.yoga.YogaValue');
   switch (typeAnnotation.type) {
     /**
      * Primitives
@@ -98,6 +99,12 @@ function toJavaType(
           importNullable();
           importReadableMap();
           return '@Nullable ReadableMap';
+
+        case 'DimensionPrimitive':
+          importNullable();
+          importYogaValue();
+          return '@Nullable YogaValue';
+
         default:
           (typeAnnotation.name: empty);
           throw new Error(
@@ -182,6 +189,11 @@ function toJavaType(
               case 'EdgeInsetsPrimitive':
                 importReadableMap();
                 return 'ReadableMap';
+
+              case 'DimensionPrimitive':
+                importYogaValue();
+                return 'YogaValue';
+
               default:
                 (elementType.name: empty);
                 throw new Error(