Import registered command to pyinstaller hook

[wchengru]

Which issue(s) does this change fix?

Why is this change necessary?

How does it address the issue?

What side effects does this change have?

Checklist

• Add input/output type hints to new functions/methods
• Write design document (Do I need to write a design document?)
• Write unit tests
• Write/update functional tests
• Write/update integration tests
• make pr passes
• make update-reproducible-reqs if dependencies were changed
• Write documentation

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[jfuss]

This looks like it is only used for testing. If so, is there no way to get this information through the tests?

[wchengru]

Removed this one.

[jfuss]

@wchengru This looks good to me. One follow up question: Did we test pyinstaller still works as we expect it to? Just being paranoid at this point.

[wchengru]

@wchengru This looks good to me. One follow up question: Did we test pyinstaller still works as we expect it to? Just being paranoid at this point.

Yes, I have tested it locally and the pyinstaller works as expected.