Enable core-scheduling in field trial config

Core scheduling enables securely running untrusted tasks (Chrome
renderer and VMs) securely by running on dedicated core, while
letting trusted tasks be co-scheduled on both hyper threads.

Bug: 152605392
Change-Id: I3db1b1515c5b28e5d42826ec1367b92582ae1a1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2372582
Commit-Queue: Joel Fernandes <joelaf@google.com>
Reviewed-by: Steven Holte <holte@chromium.org>
Auto-Submit: Joel Fernandes <joelaf@google.com>
Cr-Commit-Position: refs/heads/master@{#813077}

testing/variations/fieldtrial_testing_config.json

@@ -1846,6 +1846,25 @@
             ]
         }
     ],
+    "CrosSchedulerCore": [
+        {
+            "platforms": [
+                "chromeos"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "config": "core-scheduling"
+                    },
+                    "enable_features": [
+                        "CoreSchedulingEnabled",
+                        "SchedulerConfiguration"
+                    ]
+                }
+            ]
+        }
+    ],
     "CrostiniWebUIUpgrader": [
         {
             "platforms": [