Merge "libbinder: fix type of return value from {send,read}_msg" am: 2a2071242b

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2173482

Change-Id: If73b19a59f69340a6de45ae305046ab78a271fea
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>