init static method
Optional method to initialize the onyxsdk_pen package.
This method should be called in the main() method before runApp(), or before the first OnyxSdkPenArea widget is created.
Returns true if the device is an Onyx device, false otherwise.
Implementation
static Future<bool> init() async {
return await _OnyxSdkPenAreaState._findIsOnyxDevice();
}