Play Store could soon handle updates for sideloaded apps
https://www.androidauthority.com/play-store-update-permission-apk-3466169/
The change may let users switch update ownership for sideloaded apps to the Play Store. Evidence spotted in Play Store version 42.0.18 suggests that
users may see a new "Update from Play" option on Play Store listings for
apps installed from third-party sources, giving them the option to download
and install updates from the Play Store instead of the original source.
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