Enable TabGroupsAndroid in fieldtrial_testing_config.json

Bug: 930892
Change-Id: I85583fa6d0e6db62fb5519ed7d043870b47c9afc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2080925
Commit-Queue: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Auto-Submit: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#751924}

testing/variations/fieldtrial_testing_config.json

@@ -5449,6 +5449,21 @@
             ]
         }
     ],
+    "TabGroupsAndroid": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "TabGroupsAndroid"
+                    ]
+                }
+            ]
+        }
+    ],
     "TabGroupsDragAndDrop": [
         {
             "platforms": [