The update notification was not taking ignored apps into account.
This is the first manifestation of a class of bug I feared whereby
the properties of an App object are not initialized, but no error
is thrown. It occured because we were iterating over apps that were
created from the index file, rather than our database. Hence, they
had no knowledge about whether they should be ignored or not.
Also took the chance to perform a minor refactor of UpdateService
class. The onHandleIntent method was getting huge, so I extracted
two methods: verifyIsTimeForScheduledRun() and
performUpdateNotification(), as well as removing the unused "success"
flag.
The two methods should theoretically make the class more testable
later, as we can test the scheduled run code, and the update notification
code in separate tests, but we'll wait and see if that eventuates.