Add tests using real Gatekeeper

Test: keystore2_client_tests _with_gk
Change-Id: I2aa154a9fed6e9a1aaf54fde80b04be873a33f36
diff --git a/keystore2/tests/Android.bp b/keystore2/tests/Android.bp
index dbef46c..ff89493 100644
--- a/keystore2/tests/Android.bp
+++ b/keystore2/tests/Android.bp
@@ -42,6 +42,7 @@
     test_config: "AndroidTest.xml",
 
     rustlibs: [
+        "android.hardware.gatekeeper-V1-rust",
         "android.hardware.security.secureclock-V1-rust",
         "android.security.authorization-rust",
         "android.security.maintenance-rust",