Rework barcode detection logic

[alekslario]

Rewritten onDetected method. Fetching on every single detect is not needed since there will be false detections.
Rewritten and moved conditional logic into onDetected. Now instead of attempts (which is not very useful since 4th attempt might be a false one) detected barcodes are saved in the component state detected: { 33634646346:[numberOfDetections] }. Before fetching now a barcode has to be detected 3 times. Happens instantly from my experience.

Removed status condition if (status === 1) before
calling this.onProductFound(code). A person needs to be informed if a barcode is not in openfoodfacts database. With if (status === 1) this sad fact is not reported and the app keeps scanning forever.
Finally removed onInfoFetched since with all above changes there is no need in this method.

[moigonzalez]

Wow this is super neat! Will test it in the staging url and merge it if everything goes well 😄