[iOS][Default Promo] Add tailored promo histograms

This adds action histograms to the tailored fullscreen promo.
Including an enum to identify the type where an action happens.

Bug: 1191727
Change-Id: Ie2599089a48b64b4470f8251ff73463e7de4b12d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2845466
Commit-Queue: Javier Flores <javierrobles@chromium.org>
Reviewed-by: Ali Juma <ajuma@chromium.org>
Cr-Commit-Position: refs/heads/master@{#875247}
GitOrigin-RevId: 82b4d37002b7fe953b7b4380fa4d4f0aaccf6667
1 file changed