Updated mediawiki/extensions
Project: mediawiki/extensions/Echo  87c07e914157ba3e3f332f5c8bcdddb0d925ba3e

Only create notifications that are wanted by the recipients

Also moving getUserEnabledEvents from EchoBackend to
NotificationController since it has nothing to do with the backend.

Bug: 47664
Change-Id: I4f9682b861d9f035ae45f206c37ec0ae1c09ab64