Add MemoryAblation to field_trial_config

Bug: 
Change-Id: I9224213ed8c00e710f065dd0f24e2b20ec9332e6
Reviewed-on: https://chromium-review.googlesource.com/775321Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Commit-Queue: Maria Khomenko <mariakhomenko@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538587}

testing/variations/fieldtrial_testing_config.json

@@ -1952,6 +1952,24 @@
             ]
         }
     ],
+    "MemoryAblation": [
+        {
+            "platforms": [
+                "android"
+            ],
+            "experiments": [
+                {
+                    "name": "Enabled",
+                    "params": {
+                        "Size": "1048570"
+                    },
+                    "enable_features": [
+                        "MemoryAblation"
+                    ]
+                }
+            ]
+        }
+    ],
     "MojoCdm": [
         {
             "platforms": [