As part of the process of moving the APK downloading to an
IntentService, I'm removing and incrementally reorganizing the
existing events so that the code continues to be functional as it is
reorganized. We might want to include more detail in a download error
to expose to the user, but I think instead what will be more fruitful
is to hide details on errors where there is nothing the user can do
except retry. Then if there are errors where the user can do
something about it, then F-Droid should instead offer them the option
of doing that, and not just show an error message and walk away.
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