Merge "RpcBinder: Add AF_UNIX socketpair transport" am: 08178a7279 am: 6b7d4592e6 am: 41260c332b

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

Change-Id: I67d335cc8b4373a23e4a1ad23369f422408cfc25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>