app module's build.gradle file for Android App Bundle

build.gradle for app

// 'app' module should have the application plugin.
apply plugin: 'com.android.application'

android {
    defaultConfig {
        ...
        // Specify the version code, only once for each new version of your app, for your App Bundle
        // No need to have different version codes for different APKs generated.
        // All split APKs will share the same version code once installed via Google Play.
        versionCode 1
        versionName "1.0"
        ...
    }

    // Add this block and enable/disable the parameters as follows
    bundle {
        density {
            // Different APKs are generated for devices with different screen densities; true by default.
            enableSplit true
        }
        abi {
            // Different APKs are generated for devices with different CPU architectures; true by default.
            enableSplit true
        }
        language {
            // This is disabled so that the App Bundle does NOT split the APK for each language.
            // We're gonna use the same APK for all languages.
            enableSplit false
        }
    }
}