Add janitors to the OWNERS file am: 6044c5ac2d

Original change: https://android-review.googlesource.com/c/platform/external/fsverity-utils/+/3423511

Change-Id: Ia225ebebdae22232974f1ed064dbb87e9f7537e0
Signed-off-by: Automerger Merge Worker <[email protected]>