Add TabStateFlatBuffer to field trial config

Bug: b:307736600
Change-Id: I899f7f4bd116891ce08c6bb5e8790f3ab3045174
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5435904
Reviewed-by: Yulun Zeng <yulunz@chromium.org>
Commit-Queue: David Maunder <davidjm@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1284588}
diff --git a/testing/variations/fieldtrial_testing_config.json b/testing/variations/fieldtrial_testing_config.json
index 81d09cb..6763e2ba 100644
--- a/testing/variations/fieldtrial_testing_config.json
+++ b/testing/variations/fieldtrial_testing_config.json
@@ -18724,6 +18724,21 @@
             ]
         }
     ],
+    "TabSateFlatBuffer": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "TabStateFlatBuffer"
+                    ]
+                }
+            ]
+        }
+    ],
     "TabSearchFuzzySearchStudy": [
         {
             "platforms": [