scanning performance and privacy concerns on Android

[MrCyjaneK]

Hey! First of all - mobile_scanner is a very good scanner, but there are some concerns:

1. (Less important one) MLkit sends telemetry quite often. It is rather easy to fix it (just corrupt the sqlite database and it will crash) - nevertheless it is something that falls on the "anti-feature" list.
2. Scanning performance is great when you scan a single QR code (who would really care if it takes 400ms or 40ms) - but when compared to for example boofcv implementation scanning the same animated sequences of QR code it takes 2 times more tries to get the codes to scan properly.

I've tried to tinker with the mobile_scanner implementation, but sadly it didn't bring much performance improvements (tho to be honest all I did was change the DetectionSpeed to UNRESTRICTED).

boofcv	mobile_scanner (MLkit)
link	link

edit: p.s. the error at the end doesn't matter, it scanned all the parts properly - it is the format that has changed, and I wanted to scan exactly the same QR codes.

[navaronbracke]

Your first point is tracked in #706 I don't know how to configure MLKit to turn that off. If you know how to do that, a patch would be very welcome.

Regarding the performance issue, that mostly depends on MLKit's overall performance when detecting values. Not much we can do about that (except updating MLKit itself)