VpcEndpointService Tags cannot be added

Currently it seems impossible to add tags to a VpcEndpointService. We are using CDK Java.

### Reproduction Steps

```Java
final VpcEndpointService vpcEs = VpcEndpointService.Builder.create(this, "test")...build();

Tag.add(vpcEs, "Name", "Test");
Tag.add(vpcEs, "x", "y");
```

### Error Log
No error. It just does not work.

### Environment

- **CLI Version:** 1.18.21
- **Framework Version:** 1.44
- **Node.js Version:** 10.16.3
- **OS :** Windows 10
- **Language (Version):** Java (8)

### Other
We wanted to set Name because it also seems not possible to set the name of a VpcEndpointService

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This is :bug: Bug Report

Start from the VpcEndpointService construct and the Tag.add calls shown in the reproduction, then inspect the synthesized CloudFormation output for the service. Reproduce the case with the reported Java example and verify that the resulting endpoint service includes the requested tags and determine whether its name can be set.

Written by the indexing model from the issue text.