Add janitors to the OWNERS file am: c5e5ede317 am: a6b913871d

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

Change-Id: Ibb6d1b85355b1eed2369a8418704f3a6070e5573
Signed-off-by: Automerger Merge Worker <[email protected]>