Change testing configs according to finch study change

finch change:cl/352069245

Change-Id: I044ad0cf635e796bf35cb55f7fa08d354aa93655
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2633187
Commit-Queue: Min Qin <qinmin@chromium.org>
Reviewed-by: Steven Holte <holte@chromium.org>
Cr-Commit-Position: refs/heads/master@{#844374}

testing/variations/fieldtrial_testing_config.json

@@ -5586,9 +5586,10 @@
                     "name": "EnabledStitchAndTrending",
                     "params": {
                         "base_url": "https://chromeupboarding-pa.googleapis.com",
-                        "experiment_tag": "{enableTrending: true}",
+                        "experiment_tag": "{enableTrending: true, maxTrendingQueries: 8}",
                         "image_prefetch_mode": "top",
                         "is_unmetered_network_required": "false",
+                        "max_trending_tile_impressions": "1",
                         "most_visited_max_rows_normal_screen": "2",
                         "most_visited_max_rows_small_screen": "1",
                         "small_screen_height_threshold_dp": "700"
@@ -5597,7 +5598,8 @@
                         "QueryTiles",
                         "QueryTilesInNTP",
                         "QueryTilesInOmnibox",
-                        "QueryTilesLocalOrdering"
+                        "QueryTilesLocalOrdering",
+                        "QueryTilesRemoveTrendingAfterInactivity"
                     ],
                     "disable_features": [
                         "QueryTilesEnableQueryEditing"