Merge "libshmem: don't depend on unique_fd cast to int" into main am:...

Merge "libshmem: don't depend on unique_fd cast to int" into main am: 0161347a am: d7382e8a am: 392ca7e5

Original change: https://android-review.googlesource.com/c/platform/frameworks/av/+/2834954



Change-Id: Ie0c8be212a39d3bf939a7c2e15cc1e8179e82745
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>