Add an integration test for chrome-remote-desktop module

[nick-stroud]

This change adds a simple integration test to confirm the installation and startup of the chrome-remote-desktop module.

This test will help monitor for issues such as the one raised in #1019, and will prevent breakage to the CRD startup scripts as changes are made.

Submission Checklist

• Have you installed and run this change against pre-commit? (pre-commit install)
• Are all tests passing? (make tests)
• Have you written unit tests to cover this change?
• Is unit test coverage still above 80%?
• Have you updated all applicable documentation?
• Have you followed the guidelines in our Contributing document?

[cboneti]

Thank you for doing this. I added two comments.