- Replaced usb-serial-for-android library with raw Android USB API
(UsbDeviceConnection.bulkTransfer) — the library's testConnection()
sent a get_status CDC request that the ESP32-S3 USB-JTAG/serial
controller does not support, causing read failures
- Added CDC control interface setup (line coding + DTR/RTS) to enable
data flow before sending KEY? command
- Added retry logic: 5 attempts, 1s delay between retries, to handle
other apps grabbing the USB device first (JTAG/serial debug unit
triggers multiple system dialogs before our app gets permission)
- Re-lookup ESP device on each retry to handle device path changes
- Removed usb-serial-for-android dependency and JitPack repository
c707c21d7f