Merge "Better OWNERS for system_messages.proto" am: 74a44839b9

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2186207

Change-Id: I12dcc6ee79a83b06a79e820da82ab99ff8aeef4e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>