Story 475: Add EventLogging to profile clicks

*Add generic form of click tracking to mobile
* Turn the watchlist interaction schema into a more generic schema
* Use this schema to track clicks in the hamburger menu in beta
mode as well as the existing clicks

Dependency: I68b537e6a813b1866403135fb9d3bb7db6ca32f3
Change-Id: Icc50587a107c42caaf8441b1608d35b5cc0da97b
Merge "Story 475: Add EventLogging to profile clicks"