It's not for your phone, it's the services app for the tv.

Posted yesterday: https://www.reddit.com/r/AndroidTV/comments/5znrnf/new_android_tv_remote_service_app/

This is the app you're looking for: https://play.google.com/store/apps/details?id=com.google.android.tv.remote

It's not an app for your phone but the service in your Android TV device that lets you use the Android TV Remote app in the phone to control your TV.

It's part of the system and you don't need to do anything. The news is about it being updated through the Play Store instead of needing a full OS update. It will get the update automatically in your device.