[LiteVideo] Fieldtrial updated for beta experiment.

Bug: 1082556
Change-Id: Ida303c739b31a9af6be2d394214ece28f3613b11
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2373173
Commit-Queue: Michael Crouse <mcrouse@chromium.org>
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Auto-Submit: Michael Crouse <mcrouse@chromium.org>
Reviewed-by: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#801162}

testing/variations/fieldtrial_testing_config.json

@@ -3812,6 +3812,21 @@
             ]
         }
     ],
+    "LiteVideo": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "enable_features": [
+                        "LiteVideo"
+                    ]
+                }
+            ]
+        }
+    ],
     "LoadingPredictorDisregardAlwaysAccessesNetwork": [
         {
             "platforms": [