Upgrade drm_hwcomposer to 851ea4dc268c4da612c65a5dfedbd3ed85960405 am: 32e0a72311

Original change: https://android-review.googlesource.com/c/platform/external/drm_hwcomposer/+/3474623

Change-Id: I649808c614280456ff61a0f4bade4cd91e0292de
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>