Incorrect orientation on HEIC images

[ScanuNicco]

I'm having a problem where certain images with the .heic extension that were taken on an iPhone are rotated incorrectly. This seems like it is very likely related to #101, so it's likely a simple fix. I'm using a Kindle Fire running LineageOS 16.0.

Image displaying with incorrect orientation in Slideshow:

Image displaying with correct orientation in the default Android Gallery app.

Here's the image in question: https://drive.google.com/file/d/16VCvbHm5FVAFRjnhRCyeop8TIuRE8lWm/view?usp=sharing