[Cormorant] Disable adding a spacer to the Cormorant feed in general, and adding a bottom margin to the Cormorant error illustrations.

Currently when an error scenario shows up, the feed allows the user to scroll the view. This is because when there are 2 or less items in the feed, a spacer is added. This code disables adding a spacer, and adds a bottom margin so that the view does not get clipped when scrolled.

Distorted views without bottom margin: https://screenshot.googleplex.com/A76fo7J6GtQyADg


Bug: 1396126
Change-Id: I4bdc7910fe5ac10a0154e3896cab2aaa257bb9c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4099106
Reviewed-by: Cathy Li <chili@chromium.org>
Commit-Queue: Wissem Gamra <wiss@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1083858}