There is no built-in way to add an image link to a user profile but you can use a little trick.
Please follow these steps:
1. Add 2 fields (Image upload field and url field), set them to be visible only on edit mode.
2. Add a shortcode field, and set it to be visible only on view mode. and add [image_link] shortcode to the field.
3. Add this code snippet on your theme’s functions.php or add it using the code snippets plugin.
Please remember to change values in the code snippet with your own meta_key.