Removing outdated STS code owners and adding one that was missing am: 54a8889a61 am: a3ea9bcfc6 am: b8bcf7574a

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15729184

Change-Id: I4f5fb2afff50319851a45774f7a5284a2d04aa3d