Add hidehiko@ and oshima@ to ozone-wayland owners

osihma@ made ~50 commits and hidehiko@ made ~35 commits in
ozone-wayland respectively.

Bug: None
Change-Id: Iaa04fb3e33948b9ccc1ffeae6bc9bc664349ba70
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4191406
Commit-Queue: Mitsuru Oshima <oshima@chromium.org>
Reviewed-by: Maksim Sisov <msisov@igalia.com>
Reviewed-by: Robert Kroeger <rjkroege@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1098469}

ui/ozone/platform/wayland/OWNERS

@@ -3,3 +3,9 @@ nickdiego@igalia.com
 tonikitoo@igalia.com
 adunaev@igalia.com
 fangzhoug@chromium.org
+
+# For Keyboard / TextInput (IME)
+hidehiko@chromium.org
+
+# For Events / WindowManagement / Screen Management
+oshima@chromium.org