Don't calculate deep change information for ResutlsNotifiers without callbacks
Don't calculate deep change information for ResutlsNotifiers without callbacks

When the notifier is just being used for async query execution there's no point
in calculating the change information as it won't be used for anything.

realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-core,realm/realm-object-store,realm/realm-object-store,realm/realm-core,realm/realm-core,realm/realm-object-store,realm/realm-core