Merge "RpcBinder: Add AF_UNIX socketpair transport" am: 08178a7279 am: 6b7d4592e6

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2229557

Change-Id: I3a9157f0f8b84b5eb906681bb6bf7268bc3346a4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>