Add experiment viewed event for hubs a/b on mobile
Add experiment viewed event for hubs a/b on mobile

damassi/force,damassi/force,oxaudo/force,izakp/force,yuki24/force,joeyAghion/force,erikdstock/force,erikdstock/force,artsy/force,eessex/force,joeyAghion/force,izakp/force,damassi/force,yuki24/force,yuki24/force,izakp/force,eessex/force,anandaroop/force,oxaudo/force,artsy/force-public,artsy/force,anandaroop/force,artsy/force,artsy/force-public,erikdstock/force,oxaudo/force,izakp/force,joeyAghion/force,joeyAghion/force,eessex/force,oxaudo/force,eessex/force,yuki24/force,anandaroop/force,anandaroop/force,artsy/force,erikdstock/force,damassi/force