Fix: ding-dong example requires uos protocol; gcloud libatk-bridge2.0

[vyvy3n]

I'm submitting a...

[x] Bug Fix
[ ] Feature
[ ] Other (Refactoring, Added tests, Documentation, ...)

Checklist

• Commit Messages follow the Conventional Commits pattern
  • A feature commit message is prefixed "feat:"
  • A bugfix commit message is prefixed "fix:"
• Tests for the changes have been added

Description

Issues: Minor bug fix to help the beginners to use the repo.

1. ding-dong-bot.ts uos protocol
2. examples/tutorials/google-cloud-shell-tutorial.md: add required system dependency: libatk-bridge2.0

Notes: Thanks @choogoo for explaining uos protocol

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[CLAassistant]

All committers have signed the CLA.

[huan]

LGTM

[huan]

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