Upgrade libavc to v1.4.0 am: 6e8f8ec91d am: e7d43d3610

Original change: https://android-review.googlesource.com/c/platform/external/libavc/+/3058982

Change-Id: I92ccd872392d71baa2f1bb9ad3eb9cb92edc6319
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>