css-text: Fix an issue on justification with a bidi isolate control

Do not reset `is_after_expansion` state by a default ignorable code
point, which includes bidi controls.

Bug: 331680200
Change-Id: I2c79ec467052861e9048b0b7575e8f29dc0570b0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5401304


Commit-Queue: Koji Ishii <kojii@chromium.org>
Auto-Submit: Kent Tamura <tkent@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1280093}