Enable Rust backend for Camera HAL

Change-Id: I70ee4b41d887a9e9b1345020df9d591abdba5c65
diff --git a/graphics/common/aidl/Android.bp b/graphics/common/aidl/Android.bp
index 84bc1af..6c8ff4b 100644
--- a/graphics/common/aidl/Android.bp
+++ b/graphics/common/aidl/Android.bp
@@ -39,6 +39,9 @@
             ],
             min_sdk_version: "29",
         },
+        rust: {
+            enabled: true,
+        }
     },
     frozen: false,
     versions_with_info: [