[realbox] Disables Actions in realbox

Recent changes in m115 (likely crrev.com/c/4486138) have been causing
crashes. The plan is to disable the feature in m115, for orinj@ to
investigate a fix and merge the fix along with the feature state back
to m115.

Bug: 1445439
Change-Id: Ic7ec46bb257f562c292ea3c56098178a8f1e3af2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4557389


Commit-Queue: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Commit-Queue: Justin Donnelly <jdonnelly@chromium.org>
Auto-Submit: Moe Ahmadi <mahmadi@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1148100}