Add a New Circular Mask to the Frame and place the new Mask Container below the original Mask (Order / Send to Back)
Add a Rectangle (e.g. Solid - White) to the Mask Content
Adjust the size the the Mask containing the Rectangle to provide the desired Frame/Border Size
By use of Keyframes on the Parent Frame and the individual elements the Circular Image and its Simple Frame can be Panned, Zoomed etc and also the Circular Image can be Panned and Zoomed within the Simple Frame.