Merge "libbinder: limit RpcTransport visibility" am: 4874ba4d53 am: 21e4bf382a am: d6459e8252 am: 9e06424264

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2603985

Change-Id: I3b154dcf9bd0db679403906e5909c3511ca50507
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>