Open your Android’s Settings. It’s the ('Settings' icon) or wrench icon labeled “Settings.” You should …

Open your Galaxy’s Settings. It’s the ('Settings' icon) icon in the app drawer. You can also find it by … How to remove profile picture in Google account? - Web To remove/disassociate the photo on your Google Account Profile: when you are signed into a Google service and click your avatar/photo in a Google service, click the Google + Profile link from the dropdown menu that appears. Then click the "Edit Profile" button that appears. How do I remove someone else's Google account from my device?

Google Account

How to Remove a Google Account from an Android Phone - … Feb 05, 2019

Your Google Account automatically protects your personal information and keeps it private and safe. Every account comes with powerful features like spam filters that block 99.9% of dangerous emails before they ever reach you, and personalized security notifications that alert you of suspicious activity and malicious websites.

2.) Going thru the "google security checkup" route, it only shows me a list of actively used devices, which does not include the foreign device. So, I assume Google is the one who will "remove" the unknown device off my "device activity" list in 24 days. As long as I've changed my password I should be OK. Remove or Change Google Accounts on an Android Device