Dedup prebuilt mutator registration

Test: m checkbuild
Bug: 146540677
Change-Id: I9f8a11adf61fe6f352ec1eabc7c5bac332348ba2
diff --git a/sysprop/sysprop_test.go b/sysprop/sysprop_test.go
index fe9e82a..bdb9915 100644
--- a/sysprop/sysprop_test.go
+++ b/sysprop/sysprop_test.go
@@ -60,8 +60,7 @@
 	java.RegisterAppBuildComponents(ctx)
 	java.RegisterSystemModulesBuildComponents(ctx)
 
-	ctx.PreArchMutators(android.RegisterPrebuiltsPreArchMutators)
-	ctx.PreArchMutators(android.RegisterPrebuiltsPostDepsMutators)
+	android.RegisterPrebuiltMutators(ctx)
 	ctx.PreArchMutators(android.RegisterDefaultsPreArchMutators)
 	ctx.PreArchMutators(func(ctx android.RegisterMutatorsContext) {
 		ctx.BottomUp("sysprop_deps", syspropDepsMutator).Parallel()