Add WpIBinder to public_api, and implement Debug and Send.

Bug: 175584883
Test: mm
Change-Id: I412aba0ba4fa3002f4877cdafdb4bb61066d1dc2
diff --git a/libs/binder/rust/src/lib.rs b/libs/binder/rust/src/lib.rs
index 8ee6a62..edfb56a 100644
--- a/libs/binder/rust/src/lib.rs
+++ b/libs/binder/rust/src/lib.rs
@@ -122,7 +122,7 @@
     pub use super::parcel::ParcelFileDescriptor;
     pub use super::{add_service, get_interface};
     pub use super::{
-        ExceptionCode, Interface, ProcessState, SpIBinder, Status, StatusCode,
+        ExceptionCode, Interface, ProcessState, SpIBinder, Status, StatusCode, WpIBinder,
     };
 
     /// Binder result containing a [`Status`] on error.