libmemtrack: Add clang-format upload hook am: 8572eb5caa am: 92d6027c30 am: cf5c45f74c am: b044324bcd

Original change: https://android-review.googlesource.com/c/platform/system/memory/libmemtrack/+/2153820

Change-Id: Ie77e39495f192c04fea49c84d736c6137950f57a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>