Package com.onesignal.session.internal.outcomes.migrations

Object Summary
Object	Description
RemoveInvalidSessionTimeRecords	Purpose: Clean up invalid cached os__session_duration outcome records with zero session_time produced in SDK versions 5.1.15 to 5.1.20 missing session_time produced in SDK so we stop sending these requests to the backend. Issue: SessionService.backgroundRun() didn't account for it being run more than one time in the background, when this happened it would create a outcome record with zero time or null which is invalid.