Add janitors to the OWNERS file am: c5e5ede317

Original change: https://android-review.googlesource.com/c/platform/external/s2-geometry-library-java/+/3424003

Change-Id: I7a75f14ca7270db0cf7a023740a872d228a59fcc
Signed-off-by: Automerger Merge Worker <[email protected]>