Update scrcpy to 1.21
Changes:
- Add --tcpip option to automate TCP/IP (wireless) connections
- Add --raw-key-events to always inject key events and ignore text events
- Add --no-clipboard-autosync to disable automatic clipboard synchronization
- Add --tunnel-host and --tunnel-port options
- Ensure clipboard synchronization is performed before injecting Ctrl+V via HID keyboard
- Adapt read/write settings for Android 12
- Fix quick interruption on Ctrl+C during server starting
- Print help to stdout (instead of stderr)
- Various technical refactors and fixes