Your profile photo is associated with your Facebook account. Once you link a Facebook account to your SnR account, it will automatically grab your current profile picture from Facebook.

 

You can always reload your Facebook account on your SnR account to refresh your in-game photo to match your current Facebook profile picture. To do this, click your profile picture in the top left of the home screen to get to the "Settings", then click the edit icon on the top right, and lastly hit the Facebook Upload icon. This will ensure your latest profile picture is that of your current Facebook profile picture.