Add wrench menu metrics for new default browser menu item

Bug: 335315931
Change-Id: I520674fcb55eb41ab1142c4a34602bebac9264d1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5457944


Reviewed-by: David Pennington <dpenning@chromium.org>
Reviewed-by: Luc Nguyen <lucnguyen@google.com>
Commit-Queue: Alison Gale <agale@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1289492}