Add clang-format preupload check. am: 485e6881e5 am: c7058721b4 am: d1713661fa

Original change: https://android-review.googlesource.com/c/platform/art/+/2296597

Change-Id: I242c225ea90e24f473c989e637f69badd143db82
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>