Removing outdated STS code owners and adding one that was missing am: 25018c78e0 am: c3d277a0f4 am: b24b80545e

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

Change-Id: I7adf80b558fc4c96489d78c7b668c4b3e7882c3c