Add janitors to the OWNERS file am: 02f0a2b6af

Original change: https://android-review.googlesource.com/c/platform/external/kotlinx.atomicfu/+/3423633

Change-Id: I4411e3f1f27d5f9e93b70604d4d822551b3a62ce
Signed-off-by: Automerger Merge Worker <[email protected]>