Fix: NFC Handler dead thread issue on Android SDK 35

[Akshya107]

This PR fixes an issue where the NFC handler thread could be dead, causing IllegalStateException: Handler sending message to a dead thread errors when polling or transceiving NFC tags on Android.

Root Cause:
After upgrading the Android SDK (34 → 35) and Gradle (7 → 8), the existing NFC handler could sometimes be uninitialised or dead at the time of posting a job, leading to crashes.

Solution:
Check if the NFC handler thread exists and is alive before posting a job.
If not, create a new HandlerThread and assign a new Handler to ensure all NFC operations run on a valid thread.
Post the NFC job only after the handler is guaranteed to be alive.

[Harry-Chen]

Thanks!

[Akshya107]

hi @Harry-Chen When can we expect these changes to be merged into master? Without these fixes, Android is not working, which breaks the entire NFC-related feature. I would strongly recommend pushing these live as soon as possible.
Thank you for your attention to this matter.