Add clang-format preupload check. am: 485e6881e5

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

Change-Id: I1cc6dea0980620ddce50902d1a921be212f0b91b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>