Add "test_suites" attribute to SettingsRoboTests.

Reference: https://source.android.com/compatibility/tests/development/test-mapping#packaging_build_script_rules

Bug: 312571846

Test: config change
Change-Id: I8a3e99a59309f1f63294e0ff88fb0536164c1cd1
diff --git a/tests/robotests/Android.bp b/tests/robotests/Android.bp
index fa55f35..6d3c748 100644
--- a/tests/robotests/Android.bp
+++ b/tests/robotests/Android.bp
@@ -50,6 +50,8 @@
         "src/**/*.kt",
     ],
 
+    test_suites: ["general-tests"],
+
     static_libs: [
         "Robolectric_shadows_androidx_fragment_upstream",
         "Settings_robolectric_meta_service_file",