Merge "Export RpcServerConnection for use in Trusty" into main am: a4a2dd9bc2

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/3369320

Change-Id: Ibb453028af8ab77058c166be237eafc478590619
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>