Rationale: on Android one must use UsbManager, to access any
USB device. As a result, libraries like libusb can only use file descriptors
that are provided by UsbManager.
libusb has an API to use such file descriptors: hid_libusb_wrap_sys_device.
Having hid_libusb_wrap_sys_device currently is the only way to make hidapi
work on Android without root access and without custom Android builds.
Relevant info: https://github.com/libusb/libusb/pull/830/files