Add JapaneseUtilsTest

Bug: 237467631
Test: atest JapaneseUtilsTest
Change-Id: I7b69f1301da585a52bd7c4b528dc7b032c7a4f5e
(cherry picked from commit 07668b6429abce0699b729e8878e0b0b420fdab7)
3 files changed
tree: 8eb0aef73f7ba00e3f0b289d40fe10349fe4e489
  1. java/
  2. tests/
  3. Android.bp
  4. build.gradle
  5. OWNERS