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/JavaHelpers.js

@@ -66,10 +66,12 @@ function getImports(
       | 'EdgeInsetsPrimitive'
       | 'ImageSourcePrimitive'
       | 'PointPrimitive'
+      | 'DimensionPrimitive'
       | $TEMPORARY$string<'ColorPrimitive'>
       | $TEMPORARY$string<'EdgeInsetsPrimitive'>
       | $TEMPORARY$string<'ImageSourcePrimitive'>
-      | $TEMPORARY$string<'PointPrimitive'>,
+      | $TEMPORARY$string<'PointPrimitive'>
+      | $TEMPORARY$string<'DimensionPrimitive'>,
   ) {
     switch (name) {
       case 'ColorPrimitive':
@@ -86,6 +88,15 @@ function getImports(
       case 'EdgeInsetsPrimitive':
         imports.add('import com.facebook.react.bridge.ReadableMap;');
         return;
+      case 'DimensionPrimitive':
+        if (type === 'delegate') {
+          imports.add(
+            'import com.facebook.react.bridge.DimensionPropConverter;',
+          );
+        } else {
+          imports.add('import com.facebook.yoga.YogaValue;');
+        }
+        return;
       default:
         (name: empty);
         throw new Error(`Invalid ReservedPropTypeAnnotation name, got ${name}`);