Reduce horizontal padding from 16 to 8

As per UX review

Screenshots with change
- https://screenshot.googleplex.com/is30KnFrqJv
- https://screenshot.googleplex.com/X9RqOSW4PVz

Bug: 913646
Change-Id: I052ede08da6aaf7d994e48e69f502e182f71a878
Reviewed-on: https://chromium-review.googlesource.com/c/1427979
Reviewed-by: Becky Zhou <huayinz@chromium.org>
Commit-Queue: Lakshmi Kumar Dabbiru <dlkumar@google.com>
Cr-Commit-Position: refs/heads/master@{#625381}
1 file changed