Bug 474928

SUMMARY
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***
I am able to open HEIF/HEIC images with gwenview when I open it in the distributed by Ubuntu (although, that version seems  to crash whenever opened).  However, when I try and open a HEIF/HEIC image with the version installed via Flatpak, it returns "Loading <image name> failed Gwenview cannot display documents of type image/heif"

If I try and open a HEIF/HEIC image with the version installed via Snap, it returns "Loading <image name> failed"


STEPS TO REPRODUCE
1.  Install Gwenviw from either Snap or Flatpak
2. Open HEIF/HEIF image 


OBSERVED RESULT
Does not display image. If installed via Flatpak, shows the following:
"Loading <image name> 
failed Gwenview cannot display documents of type image/heif"

Or for Snap:
 "Loading <image name> failed"

EXPECTED RESULT
Image should be displayed.

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: Kubuntu 23.04
(available in About System)
KDE Plasma Version: 5.27.4
KDE Frameworks Version:  5.104.0
Qt Version: 5.15.8

ADDITIONAL INFORMATION
I am running what was originally Ubuntu before I installed Kubuntu over it using `sudo apt install kubuntu-desktop`