Access output files thru providers in Soong tests.

The outputFiles field on ModuleBase will be removed next.

Bug: 358425833
Test: CI
Change-Id: I6d665ac13134d9278e5908f64c454366bc6bca5e
diff --git a/rust/test_test.go b/rust/test_test.go
index dc796c8..1097da2 100644
--- a/rust/test_test.go
+++ b/rust/test_test.go
@@ -108,7 +108,7 @@
 
 	testingModule := ctx.ModuleForTests("main_test", "android_arm64_armv8-a")
 	testBinary := testingModule.Module().(*Module).compiler.(*testDecorator)
-	outputFiles := testingModule.OutputFiles(t, "")
+	outputFiles := testingModule.OutputFiles(ctx, t, "")
 	if len(outputFiles) != 1 {
 		t.Fatalf("expected exactly one output file. output files: [%s]", outputFiles)
 	}
@@ -168,7 +168,7 @@
 	testingModule := ctx.ModuleForTests("main_test", "android_arm64_armv8-a")
 	module := testingModule.Module()
 	testBinary := module.(*Module).compiler.(*testDecorator)
-	outputFiles := testingModule.OutputFiles(t, "")
+	outputFiles := testingModule.OutputFiles(ctx, t, "")
 	if len(outputFiles) != 1 {
 		t.Fatalf("expected exactly one output file. output files: [%s]", outputFiles)
 	}