AdvertisingId plugin referenced in the docs missing

[scana]

Hi! It seems that AdvertisingIdPlugin mentioned in here

analytics-kotlin/samples/kotlin-android-app/README.md

Line 5 in c33414f

- [Android AdvertisingId Plugin](src/main/java/com/segment/analytics/next/plugins/AndroidAdvertisingIdPlugin.kt)

is missing.

Was it removed on purpose or perhaps never added? We've noticed advertisingId missing after migration from analytics-android and wanted to restore the behavior.