feat(liveness): Use backend-provided values for some FaceDectector values

[vincetran]

• PR conforms to Pull Request guidelines.

Issue #, if available:
N/A

Description of changes:
This is a follow up to aws-amplify/amplify-android#2883 where that PR starts passing server-provided values to the client, this removes the hard coded values to use those server-provided values.

How did you test these changes?
"Hardcoded" different values from the Amplify library to see them reflected on the Liveness UI Component

Documentation update required?

• No
• Yes (Please include a PR link for the documentation update)

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.