[131][lensoverlay] Add field trial config for survey.

(cherry picked from commit 158c63f1)

Bug: 375067118, b:359912571
Change-Id: Ie61f3dca951ed43cc8ddd3e08c194ae379a17b95
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5952842


Reviewed-by: Jason Hu <hujasonx@google.com>
Commit-Queue: Bryan Nguyen <nguyenbryan@google.com>
Cr-Original-Commit-Position: refs/heads/main@{#1372306}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5962363
Auto-Submit: Bryan Nguyen <nguyenbryan@google.com>
Commit-Queue: Jason Hu <hujasonx@google.com>
Cr-Commit-Position: refs/branch-heads/6778@{#794}
Cr-Branched-From: b21671ca-refs/heads/main@{#1368529}

testing/variations/fieldtrial_testing_config.json

@@ -5278,6 +5278,29 @@
             ]
         }
     ],
+    "ChromnientSurvey": [
+        {
+            "platforms": [
+                "chromeos",
+                "chromeos_lacros",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "en_site_id": "LvUA3D5Ts0ugnJ3q1cK0SHbD7uPa",
+                        "probability": "1.0"
+                    },
+                    "enable_features": [
+                        "LensOverlaySurvey"
+                    ]
+                }
+            ]
+        }
+    ],
     "ClankFeedSyntheticCapabilities": [
         {
             "platforms": [