[codex] Fix SolWear NFC bridge and charging UI

[deviverr]

Summary

• Mirrors the SolWearOS charging-screen removal and Type 4 NDEF bridge support into firmware/.
• Updates the bundled Android mobile app to expose the HCE Type 4 NDEF bridge that the watch can read/write.
• Routes wallet and signature responses from the HCE service back into the mobile app NFC session state.

Root Cause

The watch hardware is the PN532 reader, but the mobile app flow was also waiting in reader mode. That made the phone and watch wait on each other instead of completing a read/write exchange.

Validation

• Flashed the updated firmware to the connected SolWear device on COM8; esptool verified bootloader, partition table, and app image.
• Built the standalone mobile app with ./gradlew.bat assembleDebug --console=plain --rerun-tasks.
• Built the bundled mobile/ copy in this repository with ./gradlew.bat assembleDebug --console=plain --rerun-tasks using the local Android SDK path.
• Built SolWearOS from the active firmware workspace with ESP-IDF 6.0 from D:\esp-idf-v6.0.1.