[FP2] apply necessary modifications and improvements

[hdlee27]

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
• New feature
• Refactor

Checklist

• 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

apply necessary modifications and improvements for new fp2 firmware

• Token initialization function is added to new firmware. Exception handling is added for when tokens for already registered devices are invalidated.
• Add the time information log received from fp2 of the important event
• Check whether the device is registered again for cases where there are many devices on the same network.
• Modify the driver not to shut down too early for remove processing when removing the device
• Other inefficient code improvement

Summary of Completed Tests

[github-actions]

Channel deleted.

[github-actions]

Test Results

   66 files    422 suites   0s ⏱️
2 171 tests 2 171 ✅ 0 💤 0 ❌
3 694 runs  3 694 ✅ 0 💤 0 ❌

Results for commit 7f2adf8.

♻️ This comment has been updated with latest results.

[github-actions]

Minimum allowed coverage is 90%

Generated by 🐒 cobertura-action against 7f2adf8