trusty: utils: trusty-ut-ctrl: declare trusty-ut-ctrl.system as cc_test

cc_test is preferred for this test utility for it to
be packaged in the test package instead of impacting
the system_ext partition.

Bug: 367423387
Test: atest TrustyVMUnitTests
Change-Id: If9fb87e33b24be02bbccec47513a295d18fdad72
diff --git a/trusty/utils/trusty-ut-ctrl/Android.bp b/trusty/utils/trusty-ut-ctrl/Android.bp
index c255614..dbd8016 100644
--- a/trusty/utils/trusty-ut-ctrl/Android.bp
+++ b/trusty/utils/trusty-ut-ctrl/Android.bp
@@ -39,8 +39,8 @@
     vendor: true,
 }
 
-cc_binary {
+cc_test {
     name: "trusty-ut-ctrl.system",
     defaults: ["trusty-ut-ctrl.defaults"],
-    system_ext_specific: true,
+    gtest: false,
 }