Merge "Update checkowners.py to support python3" am: 2f4e0217 am: 982f400a...

Merge "Update checkowners.py to support python3" am: 2f4e0217 am: 982f400a am: 6542d0fc am: 8208530f am: 987b356c

Original change: https://android-review.googlesource.com/c/platform/build/+/2053986



Change-Id: I58612000487e72a70f05ee21a584b67301263d5e
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>