feat(liveness): Add support for configuring the back camera for the no light challenge

[vincetran]

• PR conforms to Pull Request guidelines.

Issue #, if available: N/A

Description of changes: This change adds support for configuring the back camera to the liveness challege that will work in conjunction with the no light challenge. As such, this change will be merged to the no light feature branch so that it will release at the same time as no light.

How did you test these changes?
(Please add a line here how the changes were tested)

Documentation update required?

• No
• Yes

Documentation will be updated when the full feature is merged to main

General Checklist

• Added Unit Tests
• Added Integration Tests
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Ensure commit message has the appropriate scope (e.g fix(liveness): message, fix(authenticator): message, fix(all): message)

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