Removing outdated STS code owners and adding one that was missing am: 25018c78e0 am: 1648511fbb am: 07faf246b2

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15729185

Change-Id: I560b28a339f41e6b01f54e6be55f8843ae404ee3