Add keys to upper and lower characters (e.g. ⁰ and ₀).
Add keys to upper and lower characters (e.g. ⁰ and ₀).

#typingquality

PiperOrigin-RevId: 440852568

fcitx/mozc,fcitx/mozc,fcitx/mozc,google/mozc,fcitx/mozc,google/mozc,fcitx/mozc,google/mozc,google/mozc,google/mozc