{
    "EnhancedBookmarks": [
        {
            "group_name": "EnableEnhancedBookmarks",
            "params": {
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksGrid",
            "params": {
                "DefaultViewMode": "Grid",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        },
        {
            "group_name": "EnableEnhancedBookmarksList",
            "params": {
                "DefaultViewMode": "List",
                "id": "Fake_id_to_trigger_experiment_code"
            }
        }
    ]
}

Add field trial config for enhanced bookmarks.
[Android] Add field trial config for enhanced bookmarks.

BUG=427122

Review URL: https://codereview.chromium.org/1175423002

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#334096}
