Merge "libbinder: fix type of return value from {send,read}_msg" am: 2a2071242b am: dcbef39392 am: 2300724f7a

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

Change-Id: I1be4fe7b12166448ba189c0b10cc2b63b53831a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>