Add janitors to the OWNERS file am: d1c2dddc4e

Original change: https://android-review.googlesource.com/c/platform/external/python/pyserial/+/3423853

Change-Id: Ic302d6f787af87a7e1e4ccb47b71522078b1132a
Signed-off-by: Automerger Merge Worker <[email protected]>