[generate-type-forwarders] Fix enum values (#10933)

Example:

```diff
-CameraUnauthorized = 103
+CameraUnauthorized = 3
-CollaborationDataUnavailable = 304
+CollaborationDataUnavailable = 13
...
```

ref: https://gist.github.com/vs-mobiletools-engineering-service2/3ebe78b99d66d2f2addcbc1d5831e6cd

src/generate-type-forwarders/Program.cs

@@ -309,24 +309,25 @@ static bool StartParameterTypeMatch (IEnumerable<MethodDefinition> methods, ILis
 
 		static void EmitField (StringBuilder sb, FieldDefinition fd, int indent)
 		{
-			var strIndent = new string ('\t', indent);
 			if (fd.DeclaringType.IsEnum) {
 				if (!fd.IsStatic)
 					return;
-				sb.Append (strIndent);
+				sb.Append ('\t', indent);
 				sb.Append (fd.Name);
-				sb.AppendLine (",");
+				sb.Append (" = ");
+				sb.Append (fd.Constant);
+				sb.Append (',');
 			} else {
-				sb.Append (strIndent);
+				sb.Append ('\t', indent);
 				sb.Append ("public ");
 				if (fd.IsStatic)
 					sb.Append ("static ");
 				EmitTypeName (sb, fd.FieldType);
 				sb.Append (' ');
 				sb.Append (fd.Name);
 				sb.Append (';');
-				sb.AppendLine ();
 			}
+			sb.AppendLine ();
 		}
 
 		static bool HasPropertyInTypeHierarchy (TypeDefinition type, MethodDefinition accessor, out bool valid)