Migrate QS_EDIT metrics to WW

This migrates the previous Tron events into Westworld. Now we only log
the spec/package for each tile, not the position.

The position in most cases is not interesting as it can be obtained from
other places (in the future, lift this info from QSTileHost for
example).

Fixes: 147508828
Test: manual using statsd_testdrive
Change-Id: I7b27a31b303d6ebe894041433fbf9d81e57a9f3c