🖼️ Displaying iOS Live Photos

[AndyScherzinger]

• Keep both file in the WebDAV responses
• Expose the livephotos property in the WebDAV responses
• In file lists, hide the .mov file, and play the .mov file on hover or long press
  • File web UI
  • Photos web UI
  • Android Implement live photo android#12124
  • iOS Implement live photo ios#2652
• In the viewer, play the .mov file when it's opened, and add a button to allow the user to replay it

[sorbaugh]

subtask to #40242