Force Same Version Code/ Build Number to all variant APKs using Flutter

build.gradle

android {
  ...
}

// Add the below code in android/app/build.gradle after above android block

// Provide same version code to all!
import com.android.build.OutputFile

android.applicationVariants.all { variant ->
  variant.outputs.each { output ->
    output.versionCodeOverride = flutterVersionCode.toInteger()
  }
}