Make Katakana to Hiragana transliterator available to Chrome

This transliteration is needed for autofill to correctly store
phonetic name related data.

Bug: 381222780
Change-Id: Id146a77afb67c651b880b111e93d6b3e7d0b45ea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/6074369
Reviewed-by: Frank Tang <ftang@chromium.org>
9 files changed