[OSL-RV] Enable Omnibox Suggestions in Recycler View by default

Switches the default state of the flag to enabled.
Deletes OmniboxSuggestionsRecyclerView from fieldtrial testing config.

Bug: 1075602
Change-Id: I38efb6702eb253a316a756c99af9cf53e5858d6d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2362091Reviewed-by: Justin Donnelly <jdonnelly@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Commit-Queue: Filip Gorski <fgorski@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799303}

components/omnibox/common/omnibox_features.cc

@@ -354,7 +354,7 @@ const base::Feature kOmniboxKeywordSearchButton{
 // Enables using an Android RecyclerView to render the suggestions dropdown
 // instead of a ListView.
 const base::Feature kOmniboxSuggestionsRecyclerView{
-    "OmniboxSuggestionsRecyclerView", base::FEATURE_DISABLED_BY_DEFAULT};
+    "OmniboxSuggestionsRecyclerView", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Allows long Omnibox suggestions to wrap around to next line.
 const base::Feature kOmniboxSuggestionsWrapAround{

testing/variations/fieldtrial_testing_config.json

@@ -4752,21 +4752,6 @@
             ]
         }
     ],
-    "OmniboxSuggestionsRecyclerView": [
-        {
-            "platforms": [
-                "android"
-            ],
-            "experiments": [
-                {
-                    "name": "Enabled",
-                    "enable_features": [
-                        "OmniboxSuggestionsRecyclerView"
-                    ]
-                }
-            ]
-        }
-    ],
     "OmniboxSuggestionsWrapAround": [
         {
             "platforms": [