[Article suggestions] Add a test field trial config

testing/variations/fieldtrial_testing_config.json

Index: testing/variations/fieldtrial_testing_config.json
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index 5c021f019140ee72152653fbc87f76c0a92e930d..49b316fd8a64a321f24ae4312e31ecc7e1126ace 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -1298,6 +1298,29 @@
             ]
         }
     ],
+    "NTPArticleSuggestions": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "EnabledSoftFetches",
+                    "params": {
+                        "fetching_interval_hours-wifi-active_ntp_user": "8",
+                        "scheduler_trigger_types": "persistent_scheduler_wake_up,ntp_opened",
+                        "send_top_languages": "true",
+                        "soft_fetching_interval_hours-active-active_ntp_user": "2",
+                        "soft_fetching_interval_hours-active-active_suggestions_consumer": "1",
+                        "soft_fetching_interval_hours-active-rare_ntp_user": "4"
+                    },
+                    "enable_features": [
+                        "NTPArticleSuggestions"
+                    ]
+                }
+            ]
+        }
+    ],
     "NTPBookmarkSuggestions": [
         {
             "platforms": [