Update KMS README.md to include link to code examples. (#4519)
Update KMS README.md to include link to code examples. (#4519)


vam-google/google-cloud-java,vam-google/google-cloud-java,vam-google/google-cloud-java,vam-google/google-cloud-java,vam-google/google-cloud-java,vam-google/google-cloud-java