gatekeeper: generate Rust bindings

Test: TreeHugger
Change-Id: I125a2a682f39070720a3038b9b5e3407b2b467bb
diff --git a/gatekeeper/aidl/Android.bp b/gatekeeper/aidl/Android.bp
index b050f6a..169a7d5 100644
--- a/gatekeeper/aidl/Android.bp
+++ b/gatekeeper/aidl/Android.bp
@@ -25,6 +25,9 @@
         cpp: {
             enabled: false,
         },
+        rust: {
+            enabled: true,
+        },
     },
     versions_with_info: [
         {