This task is about updating the homepage schemas and/or instrumentation code for mobile. Below is a list of places in which the mobile homepage differs from the desktop version such that we would want to measure differently. Apart from this list, we will want to measure everything in the same way as desktop.
* **Hovers**: hovering with a mouse is not a concept that exists on mobile, and so we don't expect any "hover-in" or "hover-out" events.
* **Previews**: the mobile version has previews for each module that the user taps to open the full version. We want to record that tap as an event along with the module that was tapped.
* **Tooltip in impact module**: in T216220 we designed an icon that the user taps to open up a tooltip. We want to know if the user taps that icon and then again when they dismiss or close the tooltip.
* **Navigating the tabs**: we'll be implementing the tabbed layout described in T222835, and we want to know when users tab the different tab headings to navigate between the tabs.