[Extensions] Convert ListValue to Value::List in the extensionAction API.

Bug: 1187062
Change-Id: I8c225f22c961ac37db9c35ec1d4997e225cff49c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4029661


Auto-Submit: David Bertoni <dbertoni@chromium.org>
Reviewed-by: Tim <tjudkins@chromium.org>
Commit-Queue: Tim <tjudkins@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072307}