[Feature request] Use Document Scanner as Photo Picker

**What's your feature request? Please describe.**
Google's photopicker does not have a camera option. So we would like to use MLKit Document Scanner as the photopicker with camera and filters. But this means that the document scanning functionality will be completely disabled.

**Mobile environment**
Android, IOS

**Additional context**
We are migrating our app from using ScanBot SDK to use Google MLKit document scanner. However, some parts still need ScanBot for photopicker from gallery and camera. All the parts that require scanning we are now using MLKit, but for photopicking, MLKit does not offer this feature hence this might stop us from using MLKit altogether since ScanBot offers these features.