Make OdsignInfo available for Rust

CompOS will use this to generate the compos.info file.

Bug: 161471326
Test: Builds
Change-Id: I98bb9e8086f404a340f99aa1874cdbe01c53ad61
diff --git a/ondevice-signing/proto/Android.bp b/ondevice-signing/proto/Android.bp
index 173aae4..d6e3354 100644
--- a/ondevice-signing/proto/Android.bp
+++ b/ondevice-signing/proto/Android.bp
@@ -32,6 +32,17 @@
     ],
 }
 
+rust_protobuf {
+    name: "libodsign_proto_rust",
+    crate_name: "odsign_proto",
+    protos: ["odsign_info.proto"],
+    source_stem: "odsign_proto",
+    host_supported: true,
+    apex_available: [
+        "com.android.compos",
+    ],
+}
+
 cc_library_static {
     name: "lib_compos_proto",
     host_supported: true,