Merge "Adjust visibility of libbinder_rpc_unstable" into main am: e44315c6 am: 82de7043

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2969171



Change-Id: I6e1ccb3d79ec7329c80cf525a5ea942583d93580
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>