Removing outdated STS code owners and adding one that was missing am: 25018c78e0 am: 1648511fbb am: 07faf246b2 am: 77251d9174

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

Change-Id: Ib688c3ccce8ec43f581e84228bc3b4d076a51d82