Add Unique Serial ID to X-Input Device Descriptor

[arntsonl]

Currently we have an X-Input String version with a static value of "08FEC93" in XInputDescriptors.h

According to https://learn.microsoft.com/en-us/windows-hardware/test/hlk/testref/0f2d5113-cf70-4cda-8afc-b7005d1e2739 the version ID with the serial should be unique per device to tell Windows when a "new" device has been plugged in versus an already recognized device.

What we should do is remove our 4 byte serial and replace it with the first-last-hash? 4 bytes of the unique Pico ID serial. This can be done at driver start-up once.

[arntsonl]

We are already doing this for the Xbox One which uses a much larger 16 byte serial ID. We are doing it with the following code:

static const uint8_t * xbone_get_string_descriptor(int index) {
	if ( index == 3 ) {
		// Generate a serial number from the pico's unique ID
		pico_unique_board_id_t id;
		pico_get_unique_board_id(&id);
		memcpy(uniqueSerial, (uint8_t*)&id, PICO_UNIQUE_BOARD_ID_SIZE_BYTES);
        return uniqueSerial;
	} else if ( index == 4 ) { // security method used
		return xboxSecurityMethod;
	} else if ( index == 0xEE ) { // ONLY WINDOWS DOES THIS??
		return xboxOSDescriptor;
	}
	return xbone_string_descriptors[index];
}

If we could convert this to our 3-byte serial ID for the xbox OG, we'd be in good shape