[test][refactoring] Use libx509_cert_nostd in rialto_test

Removes the usage of x509-parser so that we can remove this
crate later.

Test: atest rialto_test
Change-Id: I688b4c00b6fa10767b965d85320c7ee11ede772a
diff --git a/rialto/Android.bp b/rialto/Android.bp
index 5e7fe1f..6fcb654 100644
--- a/rialto/Android.bp
+++ b/rialto/Android.bp
@@ -142,7 +142,7 @@
         "libservice_vm_fake_chain",
         "libservice_vm_manager",
         "libvmclient",
-        "libx509_parser",
+        "libx509_cert_nostd",
     ],
     data: [
         ":rialto_unsigned",