Fixes Uncaught TypeError on getDevice due to default being empty

[AltamashShaikh]

Description:

Fixes Uncaught TypeError on getDevice due to default being empty Fixes: https://github.com/matomo-org/matomo/issues/21572

Review

• [ ] Functional review done
• [ ] Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• [ ] Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• [ ] Security review done
• [ ] Wording review done
• [ ] Code review done
• [ ] Tests were added if useful/possible
• [ ] Reviewed for breaking changes
• [ ] Developer changelog updated if needed
• [ ] Documentation added if needed
• [ ] Existing documentation updated if needed

[snake14]

@AltamashShaikh It looks like the test case that I added needs to be updated corresponding to your change.

[AltamashShaikh]

@AltamashShaikh It looks like the test case that I added needs to be updated corresponding to your change.

@snake14 Yes, updated and added 1 more new case