- Add USB Host permissions and device filter to AndroidManifest.xml
- Create UsbSerialPlugin Kotlin plugin for USB Host API (enumerate, permission, open devices)
- Add serial_connect_fd command for Android to accept USB file descriptors
- Create RawFdStream wrapper for async I/O on raw file descriptors
- Make run_serial_with_poll generic over AsyncRead+AsyncWrite
- Register UsbSerialPlugin in MainActivity
- Initialize Tauri Android project structure (gen/android)
- Fix desktop_dir() unavailability on Android in file_explorer.rs and serial.rs
- Fix minimize/maximize/unmaximize unavailability on Android in window.rs
- Remove updater:default permission from default capabilities (not available on Android)
- Update .gitignore for Android build artifacts
- Successfully builds APK for aarch64-linux-android target
