Enchancement suggestion: Delete old APKs for installed apps in storage

[eddie-LA]

Using APK Mirror forwards the user to their site and the user has to manually install the update. It's not ideal but automation might not be easy or at all doable currently.

Therefore, a suggestion to make it easier for the user is to help them by allowing them to remove old APK files for versions older than the one installed directly from the app. APK Updater already has Storage permissions so this should be doable.