Add janitors to the OWNERS file am: cc124f3441

Original change: https://android-review.googlesource.com/c/platform/external/mobly-snippet-lib/+/3423787

Change-Id: I648cad3f69b811eaf1cdfb834fe4d113d0829497
Signed-off-by: Automerger Merge Worker <[email protected]>