Device manager - security recommendations section (PSG-639)

[kerryarchibald]

Checklist

• [ ] Tests written for new code (and old code if feasible)
• [ ] Linter and other CI checks pass
• [ ] Sign-off given on the changes (see CONTRIBUTING.md)

Notes: Device manager - security recommendations section

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Here's what your changelog entry will look like:

✨ Features

• Device manager - security recommendations section (#9179). Contributed by @kerryarchibald.