[rkpvm] Move requests module to a separate library

To facilitate the testing later.

No code change in this cl.

Bug: 301068421
Test: atest rialto_test
Change-Id: Iec5b56f08ae462d83dad1e97cd0031fe16eb3189
diff --git a/service_vm/requests/src/lib.rs b/service_vm/requests/src/lib.rs
new file mode 100644
index 0000000..fc0c87d
--- /dev/null
+++ b/service_vm/requests/src/lib.rs
@@ -0,0 +1,25 @@
+// Copyright 2023, The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//! This library contains functions for the request processing.
+
+#![no_std]
+
+extern crate alloc;
+
+mod api;
+mod pub_key;
+mod rkp;
+
+pub use api::process_request;