Merge "libbinder: limit visibility of test ifaces" am: 45d2d9b16f am: 19a3e5c525 am: 73524d02e1

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2433915

Change-Id: Ib7bafb5d6d58389cfd42a7248591ec9a36448343
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>