Merge "Implement Send for RpcServerConnection" into main am: c643576

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/3398707

Change-Id: Ie59c0d96d355b2ba307e38fe66d72a1239cf5d0f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>

Author: Hasini Gunasinghe

libs/binder/rust/rpcbinder/src/server/trusty.rs

@@ -106,6 +106,10 @@ pub struct RpcServerConnection {
     ctx: *mut c_void,
 }
 
+// SAFETY: The opaque handle: `ctx` points into a dynamic allocation,
+// and not tied to anything specific to the current thread.
+unsafe impl Send for RpcServerConnection {}
+
 impl Drop for RpcServerConnection {
     fn drop(&mut self) {
         // We do not need to close handle_fd since we do not own it.