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Records metrics for several Discover feed back of card actions:
- Open in same tab
- Open in new tab
- Open in incognito tab
- Add to reading list
- Open Send Feedback form
Required by crrev.com/i/3245773.

Bug: 1085419, 1122409
Change-Id: Idf4d2dcf958a49828eedf4d090432741e6db44ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2387402
Commit-Queue: Adam Trudeau-Arcaro <adamta@google.com>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#803540}