- Updated the _friendlyErrorMessage method in UsbScreen to provide more user-friendly error messages based on specific PlatformException codes.
- Added localized error messages for various USB-related errors, improving clarity for users.
- Modified the UsbSerialService to rethrow exceptions instead of throwing StateError, allowing for better error propagation.
- Updated the usb_flow_test to reflect changes in the USB display label behavior, ensuring the test accurately describes the functionality.
- replace Android USB dependency with app-owned USB host implementation\n- restore BLE-first scanner flow with USB secondary action\n- tighten Web Serial key handling and disconnect logging\n\nTODO (follow-up):\n- review non-English localization copy for tone and consistency\n- trim remaining unused/awkward localization strings introduced during USB UI changes