[Aqara/Locks] Improvement of credential info management

[seojune79]

Check all that apply

Type of Change

• [ ] WWST Certification Request
  • If this is your first time contributing code:
    • [ ] I have reviewed the README.md file
    • [ ] I have reviewed the CODE_OF_CONDUCT.md file
    • [ ] I have signed the CLA
  • [ ] I plan on entering a WWST Certification Request or have entered a request through the WWST Certification console at developer.smartthings.com
• [ ] Bug fix
• [x] New feature
• [ ] Refactor

Checklist

• [x] I have performed a self-review of my code
• [ ] I have commented my code in hard-to-understand areas
• [ ] I have verified my changes by testing with a device or have communicated a plan for testing
• [ ] I am adding new behavior, such as adding a sub-driver, and have added and run new unit tests to cover the new behavior

Description of Change

Summary of Completed Tests