Fix warnings from rustc 1.65.0

Bug: 250026064
Test: m rust
Change-Id: Ic61c901d900ee9546653f05b30e4d7d579626fa6
diff --git a/libs/binder/rust/tests/integration.rs b/libs/binder/rust/tests/integration.rs
index 4e10fa9..ca2cedc 100644
--- a/libs/binder/rust/tests/integration.rs
+++ b/libs/binder/rust/tests/integration.rs
@@ -502,7 +502,7 @@
         let instances = binder::get_declared_instances("android.hardware.light.ILights")
             .expect("Could not get declared instances");
 
-        let expected_defaults = if has_lights { 1 } else { 0 };
+        let expected_defaults = usize::from(has_lights);
         assert_eq!(expected_defaults, instances.iter().filter(|i| i.as_str() == "default").count());
     }