[T-6858] Hand tracking doesn’t register dynamic object for controllers

[AtifMahmud]

Description

Controllers weren't being added to manifest if you use only hands or none. Details can be found in the notion doc: https://www.notion.so/cognitive3d/T-6858-Hand-tracking-doesn-t-register-dynamic-object-for-controllers-62b023d1c105462592d3d548fac0e5f6?pvs=4

Height Task ID(s) (If applicable): https://c3d.height.app/T-6858

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist

• [x] My changes will not interrupt or disrupt automated build processes
• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] My changes generate no new warnings
• [x] I have assigned this PR to myself in GitHub
• [x] I have assigned and notified Reviewers for this PR

[height[bot]]

This pull request has been linked to 1 task:

• T-6858 Hand tracking doesn’t register dynamic object for controllers (unlink task)

💡Tip: Add "Close T-6858" to the pull request title or description, to a commit message, or in a comment to mark this task as "Done" when the pull request is merged.