Pass ICU via file descriptor instead of fetching via Java for renderers

This is a partial revert of
https://chromium-review.googlesource.com/c/chromium/src/+/4357575.

This should still load the browser process' ICU early, but reverts
non-browser processes to what they were before the above change. I
think this should still keep this bug fixed, while enabling javaless
renderers to continue.

Bug: 411426303
Change-Id: Id09cc41d80b7aa1d0104fbc751e3b2a55666b7c7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6579823
Auto-Submit: Sam Maier <smaier@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Sam Maier <smaier@chromium.org>
Owners-Override: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1467176}