[fuchsia] Bring more changes from the Fuchsia copy

Bug: 1124037, fuchsia:56362
Change-Id: I463e8751ae2b865181340abec1dc1d1afb716060
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/2406752
Reviewed-by: Frank Tang <ftang@chromium.org>
1 file changed