[omnibox][actions] Fix action chip focus ring getting cut off.

Due to the set of UI updates introduced in http://crrev/c/4923170, it
looks like the focus ring is now getting cut off due to improper insets.

This CL updates the left margin of the very first action button in the
row and adjusts the right margin of the match cell view to accommodate
this change.

As a result, the non-focused state will remain unchanged, but the
focused state will now render the proper action chip UI (i.e. it will
no longer appear cut off).

NOTE: All below screenshots were taken with the
#actions-ui-simplification feature flag enabled.

non-focused
===========
BEFORE: http://screen/6BRYdZQNxoKKtGi
AFTER:  http://screen/6Gj2jooRnYg2bhn

BEFORE: http://screen/8bJfHpmfZjzHTDw
AFTER:  http://screen/4FBE7dbhSvZdYxy

focused
=======
BEFORE: http://screen/8Bd87mi2H4LqVoq
AFTER:  http://screen/3Ls3WKvxguaFqka

BEFORE: http://screen/9StoroAaEvMt5kV
AFTER:  http://screen/5cj6vnHUCX9Twju

BEFORE: http://screen/3cPxiqgm4MbuXdw
AFTER:  http://screen/7gt9Yth8yH3HcmH

Bug: 1479721
Change-Id: Ib4c758aa7ed8662cf2d0246cedf62f41d51ac167
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4936855
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Orin Jaworski <orinj@chromium.org>
Commit-Queue: Khalid Peer <khalidpeer@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1209030}