GitLab

- Plumb actions from FeedStreamSurface over to MetricsReporter
- Port EngagementType reporting from FeedLoggingBridge to
  work with feed v2.

Bug: 1044139
Change-Id: Ia6478ddcfa25445c15a8874aad20bfccf9fcaad1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2137854
Commit-Queue: Dan H <harringtond@chromium.org>
Reviewed-by: Carlos Knippschild <carlosk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#757665}