Chrome OS - PIN Auto Submit - Enable by default

Set the feature PIN auto submit to be enabled by default.
Feature approved on https://crbug.com/1001963

Bug: 663982
Change-Id: If24601b8eb632a83928ee6e6c19c578b1e6672c5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2379750
Auto-Submit: Renato Silva <rrsilva@google.com>
Reviewed-by: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Denis Kuznetsov [CET] <antrim@chromium.org>
Commit-Queue: Renato Silva <rrsilva@google.com>
Cr-Commit-Position: refs/heads/master@{#802199}

chromeos/constants/chromeos_features.cc

@@ -396,7 +396,7 @@ const base::Feature kQuickAnswersTranslation{"QuickAnswersTranslation",
 
 // Controls whether the PIN auto submit feature is enabled.
 const base::Feature kQuickUnlockPinAutosubmit{
-    "QuickUnlockPinAutosubmit", base::FEATURE_DISABLED_BY_DEFAULT};
+    "QuickUnlockPinAutosubmit", base::FEATURE_ENABLED_BY_DEFAULT};
 
 // TODO(crbug.com/1104164) - Remove this once most
 // users have their preferences backfilled.