Add janitors to the OWNERS file am: ca46dcc1c3 am: a7794c033a

Original change: https://android-review.googlesource.com/c/platform/external/libexif/+/3423518

Change-Id: I15ff15af21e2ad066701a608b84f6222b3f1406c
Signed-off-by: Automerger Merge Worker <[email protected]>