Immediately after an app uninstall, the associated App will be updated
by a call to reset() in the AppObserver.onChange().
But before receiving this event, the activity and the fragments resume,
leading to a call to getInstalledStatus(…). At this stage, we don't know
that the app has been removed yet, but the package manager already
removed it. Therefore, PackageManager.getInstallerPackageName(…) throws
an IllegalArgumentException.
In that case, consider that the application has been uninstalled.
Should fix issue #167https://gitlab.com/fdroid/fdroidclient/issues/167
89bedfda13