Fix libusb callback for Windows
Fix libusb callback for Windows

Add LIBUSB_CALL so that the callback has the correct signature on
Windows (including __attribute__((stdcall))).

PR #3011 <https://github.com/Genymobile/scrcpy/pull/3011>

Genymobile/scrcpy,Genymobile/scrcpy,Genymobile/scrcpy