[Feature] Select Custom App Icon in App Info

[EmiyaSyahriel]

Discussed in https://github.com/EmiyaSyahriel/CrossLauncher/discussions/72

^{Originally posted by AkiraKusanagi December 3, 2023} What if when you view the app's info, and where it shows the image of the app on top of the info, then there's a button that says, "Add/select custom icon" where you can select an image from your gallery? This would make things easier.