Possible onProcessingFailed (ScannerError) codes

Code	Description
NONE	No error.
GENERAL	General error check message
PERMISSION_CAMERA_MISSING	Will return failed to process if camera permission is missing.
MANUAL_EXTRACTION_IMAGE_EXTRACTION	Manual extraction failed image extraction (No rectangle detected).
CAMERA	Journey Failed because of camera failure
EXECUTION	Execution error, most likely exceptions from which we are not recovering, will send exception localized message.
	For more information check JavaDocs on possible call exceptions.