Add janitors to the OWNERS file am: 736d9c3e17

Original change: https://android-review.googlesource.com/c/platform/external/libchrome/+/3423745

Change-Id: I932f3df7daa22d7fb7a81b39c580bc135ca25360
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>