Replace deprecated Context::getStats() with MWServices::getStatsdDataFactory()
Replace deprecated Context::getStats() with MWServices::getStatsdDataFactory()

Change-Id: Ia0791472c3569edc269d993bd0d91becd56e70da

wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo,wikimedia/mediawiki-extensions-Echo