[API][vm_payload] Rename vm_service.rs to vm_payload_service.rs

This cl renames vm_service.rs to vm_payload_service.rs as it
handles the interaction with vm_payload_service now instead of
vm_service.

Test: atest MicrodroidTests
Bug: 243513370
Change-Id: I5c7d453e58dd22f67ec7f0fa640de087bd676c83
diff --git a/microdroid/vm_payload/src/lib.rs b/microdroid/vm_payload/src/lib.rs
index ca0c17b..be6cf93 100644
--- a/microdroid/vm_payload/src/lib.rs
+++ b/microdroid/vm_payload/src/lib.rs
@@ -12,11 +12,11 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//! Library for payload to communicate with the VM service.
+//! Library for payload to communicate with the Microdroid Manager.
 
-mod vm_service;
+mod vm_payload_service;
 
-pub use vm_service::{
+pub use vm_payload_service::{
     AVmPayload_getDiceAttestationCdi, AVmPayload_getDiceAttestationChain,
     AVmPayload_getVmInstanceSecret, AVmPayload_notifyPayloadReady,
 };
diff --git a/microdroid/vm_payload/src/vm_service.rs b/microdroid/vm_payload/src/vm_payload_service.rs
similarity index 100%
rename from microdroid/vm_payload/src/vm_service.rs
rename to microdroid/vm_payload/src/vm_payload_service.rs