Official comment
We released Contacts Quick View on Dec. 12, 2019 and it includes a provision for an image for your Contacts:
We attempt to populate the image with a gravatar, if a public one associated with the email address is available. If an image is not available we use the contact's initials (latin characters only). If the intials are not available we use a generic profile image. You can hover over the image and click it to upload a new image.