Mock System Settings for NotificationAttentionHelperTest

 Always enable Settings.System.NOTIFICATION_COOLDOWN_ENABLED
  so it does not depend on DUT settings.

Flag: EXEMPT bugfix
Test: atest NotificationAttentionHelperTest
Bug: 343696778
Change-Id: I46b109156a016c41e379ab66fb51a0c324b09736
diff --git a/services/tests/uiservicestests/src/com/android/server/notification/NotificationAttentionHelperTest.java b/services/tests/uiservicestests/src/com/android/server/notification/NotificationAttentionHelperTest.java
index 3da8031..7f6a81f 100644
--- a/services/tests/uiservicestests/src/com/android/server/notification/NotificationAttentionHelperTest.java
+++ b/services/tests/uiservicestests/src/com/android/server/notification/NotificationAttentionHelperTest.java
@@ -221,6 +221,10 @@
         Settings.System.putInt(getContext().getContentResolver(),
                 Settings.System.NOTIFICATION_LIGHT_PULSE, 1);
 
+        // Enable notification cooldown independent of device Settings
+        Settings.System.putInt(getContext().getContentResolver(),
+                Settings.System.NOTIFICATION_COOLDOWN_ENABLED, 1);
+
         Resources resources = spy(getContext().getResources());
         when(resources.getBoolean(R.bool.config_useAttentionLight)).thenReturn(true);
         when(resources.getBoolean(