[Feature request] Configure minimum length for ITF format

**What's your feature request? Please describe.**
We use ITF barcodes that are only 2 characters long, and it looks like the minimum length for the ITF format is 6 characters, so this will prevent us from being able to use MLKit.

**Mobile environment**
Android

**Additional context**
We're scanning metal pans that are laser engraved with barcodes in a restaurant environment, so unfortunately we can't change the barcode format. Each pan has an id that may range from 01 to 99. We're currently scanning using ZBar on a non-android app, and we did encounter flakiness with the format. The current application compensates using business logic, so that it requires several consecutive scans before it accepts a scan. We'd like to convert to android + MLKit, but the minimum length looks like it will prevent us from being able to use MLKit.