Expand Gatekeeper test

Try verifying a previous enrollment after replacing it with a new
enrollment. This used to succeed when using in-memory records, but
should fail.

Bug: 160731903
Test: build, run

Change-Id: Ibe3c86c9b8b6afb7d2941c6805416817d7b76f21
diff --git a/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp b/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
index e74cca9..7d32ced 100644
--- a/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
+++ b/gatekeeper/1.0/vts/functional/VtsHalGatekeeperV1_0TargetTest.cpp
@@ -306,6 +306,8 @@
   if (first != nullptr && second != nullptr) {
     EXPECT_NE(first->user_id, second->user_id);
   }
+  // the old enrollment should be invalid now
+  verifyPassword(password, enrollRsp.data, 0, verifyRsp, false);
   ALOGI("Testing Untrusted Reenroll done");
 }