flutter.bat : WARNING: Your app uses the following plugins that apply Kotlin Gradle Plugin (KGP): mobile_scanner
At line:2 char:1
+ & 'D:\Tools\flutter\bin\flutter.bat' build apk --release 1> 'C:\Apach ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (WARNING: Your a... mobile_scanner:String) [], RemoteException
    + FullyQualifiedErrorId : NativeCommandError
 
Future versions of Flutter will fail to build if your app uses plugins that apply KGP.

Please check the changelogs of these plugins and upgrade to a version that supports Built-in Kotlin.
If no such version exists, report the issue to the plugin. If necessary, here is a guide on filing 
an issue against a plugin: https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-app-develop
ers#report-incompatible-kotlin-gradle-plugin-usage-to-plugin-authors

If you are a plugin author, please migrate your plugin to Built-in Kotlin using this guide: 
https://docs.flutter.dev/release/breaking-changes/migrate-to-built-in-kotlin/for-plugin-authors