Verify that all events are...
correct for each screen
Are the custom fields correct?
are sent to the right place
the same as the iOS events
Note: RegisterActivity is currently sending ISegment.Screens.LAUNCH_ACTIVITY, which is being sent by Launch and DiscoveryLaunch activities too. We should have a separate identification for RegisterActivity.
Note: Maybe we should define a version of trackScreenView() that doesn't need the action parameter, considering that we're only sending null in these places.
Note: We are sending a BATCH_VIDEOS_DOWNLOAD call on a single video download in subsection-view, need to fix that too.