Make the rust features property configurable

Test: m nothing --no-skip-soong-tests
Bug: 364533958
Change-Id: I2aa5b7e1cf5e8c94448e4562e8b9aebe6edacfe5
diff --git a/rust/project_json.go b/rust/project_json.go
index 24dcc89..6c1e320 100644
--- a/rust/project_json.go
+++ b/rust/project_json.go
@@ -151,7 +151,7 @@
 		crate.Env["OUT_DIR"] = rModule.compiler.cargoOutDir().String()
 	}
 
-	for _, feature := range rModule.compiler.features() {
+	for _, feature := range rModule.compiler.features(ctx, rModule) {
 		crate.Cfg = append(crate.Cfg, "feature=\""+feature+"\"")
 	}