Add janitors to the OWNERS file am: f5c567ff5c am: eaddfa72c1

Original change: https://android-review.googlesource.com/c/platform/external/piex/+/3423979

Change-Id: I42b110bd955854b8c3b09cf562510a2f527ceb34
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>