Add UnidoDeviceExpiration to test config.

Bug: 1030266
Change-Id: I08e3f59e0a3d03ce77b6f669e1cfa1a72fae2ad1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1985760Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Michael van Ouwerkerk <mvanouwerkerk@chromium.org>
Cr-Commit-Position: refs/heads/master@{#727989}

testing/variations/fieldtrial_testing_config.json

@@ -6938,6 +6938,28 @@
             ]
         }
     ],
+    "UnidoDeviceExpiration": [
+        {
+            "platforms": [
+                "android",
+                "chromeos",
+                "linux",
+                "mac",
+                "windows"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled_24",
+                    "params": {
+                        "SharingDeviceExpirationHours": "24"
+                    },
+                    "enable_features": [
+                        "SharingDeviceExpiration"
+                    ]
+                }
+            ]
+        }
+    ],
     "UnidoOnSignIn": [
         {
             "platforms": [