[EoC] Add entry for ExploreOnContent to fieldtrial_testing_config.json

BUG=832685

Change-Id: Ie8088a65f8d264de00b8930aea4e16d06317eb98
Reviewed-on: https://chromium-review.googlesource.com/1026649Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#553347}

testing/variations/fieldtrial_testing_config.json

@@ -1321,6 +1321,28 @@
             ]
         }
     ],
+    "ExploreOnContent": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "ExploreOnContent",
+                    "params": {
+                        "availability": "any",
+                        "event_trigger": "name:explore_on_content_iph_trigger;comparator:==0;window:680;storage:680",
+                        "event_used": "name:contextual_suggestions_opened;comparator:<1;window:680;storage:680",
+                        "session_rate": "<1"
+                    },
+                    "enable_features": [
+                        "ContextualSuggestionsBottomSheet",
+                        "IPH_ContextualSuggestions"
+                    ]
+                }
+            ]
+        }
+    ],
     "ExtensionContentVerification": [
         {
             "platforms": [