Add option:hover styles to appearance:base-select
These styles were implemented for and I think they should
be included for appearance:base-select as well.
Bug: 1511354
Change-Id: I22b23cd7102cb197ba37b3d150071306ef9d8b9e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5493158
Reviewed-by: David Baron dbaron@chromium.org
Commit-Queue: Joey Arhar jarhar@chromium.org
Cr-Commit-Position: refs/heads/main@{#1297145}