[Feature request] GmsBarcodeScanner to detect multiple bar codes or with filter option

**What's your feature request? Please describe.**
As part of GmsBarcodeScannerOptions in the code scanner beta, I would like to have the option to scan list of bar codes appear on the screen. Or when multiple barcode is visible in camera, I should configure to detect only a particular barcode based on length or string starts with along with the format.

**Mobile environment**
Android, IOS or both