Add janitors to the OWNERS file am: 0a30c48a46

Original change: https://android-review.googlesource.com/c/platform/external/testng/+/3423325

Change-Id: I715d1d9b2bd474ad82fa40d3d1519940d695c10c
Signed-off-by: Automerger Merge Worker <[email protected]>