Include type arguments for non-synthetic FunctionTypeImpl(s) into displayName.

pkg/analyzer/test/src/summary/resynthesize_common.dart

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index 23d113b5cb54d9274c638a63cb16f525c3ce756c..f22a214273364cf04f014d7713eb69b770ae3ff7 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -9768,7 +9768,7 @@ F f;
           library,
           r'''
 typedef dynamic F<T extends num>(T p);
-F f;
+F<num> f;
 ''');
     } else {
       checkElementText(
@@ -13715,14 +13715,14 @@ F f;
           library,
           r'''
 typedef U F<T, U>(T t);
-F f;
+F<int, String> f;
 ''');
     } else {
       checkElementText(
           library,
           r'''
 typedef U F<T, U>(T t);
-F f;
+F<int, String> f;
 ''');
     }
   }