A small amendment to application:didRegisterForRemoteNotificationsWithDeviceToken: so I can see the deviceToken in hex

UnityAppController.mm

- (void)application:(UIApplication*)application didRegisterForRemoteNotificationsWithDeviceToken:(NSData*)deviceToken
{
    NSUInteger dataLength = deviceToken.length;
    if (dataLength > 0) {
        const unsigned char *dataBuffer = (const unsigned char *)deviceToken.bytes;
        NSMutableString *hexString  = [NSMutableString stringWithCapacity:(dataLength * 2)];
        for (int i = 0; i < dataLength; ++i) {
          [hexString appendFormat:@"%02x", dataBuffer[i]];
        }
        NSLog(@"APNS Test: deviceToken=%@", hexString);
    }
    
    AppController_SendNotificationWithArg(kUnityDidRegisterForRemoteNotificationsWithDeviceToken, deviceToken);
    UnitySendDeviceToken(deviceToken);
}