Add fieldtrial config for lens chip experiment

TBR=Time sensitive, low risk

Bug: 1099982
Change-Id: Ib09444062d5cc24ec7d690950099b70fbc2bb166
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2595482
Commit-Queue: Ben Goldberger <benwgold@google.com>
Reviewed-by: Ben Goldberger <benwgold@google.com>
Auto-Submit: Ben Goldberger <benwgold@google.com>
Cr-Commit-Position: refs/heads/master@{#837894}

testing/variations/fieldtrial_testing_config.json

@@ -1904,6 +1904,24 @@
             ]
         }
     ],
+    "ContextMenuGoogleLensChip": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "ShoppingChipEnabled1Percent_20201216",
+                    "params": {
+                        "disableOnIncognito": "true"
+                    },
+                    "enable_features": [
+                        "ContextMenuGoogleLensChip"
+                    ]
+                }
+            ]
+        }
+    ],
     "ContextMenuSearchWithGoogleLens": [
         {
             "platforms": [