[rkp] Retrieve attestation key from rkpd

The attestation keys are passed to the RKP VM together with
the client VM CSR for attestation.
The key retrieval only occurs when the remote_attestation
feature flag is enabled.

Bug: 241428146
Test: m com.android.virt
Test: atest libservice_vm_requests.test rialto_test
Change-Id: I285f9b53104f1240863c0e36007b3db0b2af23aa
diff --git a/virtualizationservice/src/main.rs b/virtualizationservice/src/main.rs
index fd668bc..d80ddd4 100644
--- a/virtualizationservice/src/main.rs
+++ b/virtualizationservice/src/main.rs
@@ -33,7 +33,7 @@
 use std::path::Path;
 
 const LOG_TAG: &str = "VirtualizationService";
-const _REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME: &str =
+pub(crate) const REMOTELY_PROVISIONED_COMPONENT_SERVICE_NAME: &str =
     "android.system.virtualization.IRemotelyProvisionedComponent/avf";
 
 fn get_calling_pid() -> pid_t {