Add Owners file to manage dumpstate am: ec4736a3ec

Original change: https://android-review.googlesource.com/c/device/google/gs101/+/2185955

Change-Id: If0a0b7a2ec5797d257d0a5e51cc707da005b0ed0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>