Change to use test option to mark unit_test

Bug: 172006742
Test: m
Change-Id: I34e34dabc9bc80f1f35bdb35469978eda50347d5
diff --git a/Android.bp b/Android.bp
index 2f84b9f..89bc8aa 100644
--- a/Android.bp
+++ b/Android.bp
@@ -102,8 +102,10 @@
     test_config: "acloud_unittest.xml",
     test_suites: [
         "general-tests",
-        "host-unit-tests",
     ],
+    test_options: {
+        unit_test: true,
+    }
 }
 
 python_library_host {