Enable PasswordSearch feature by default

As we have all approvals and the feature will fully launch with 66,
enable it by default.

Bug: 794108
Change-Id: I2cc5badc77391ff8bfe56b8653381c3648fd06a7
Reviewed-on: https://chromium-review.googlesource.com/999516
Reviewed-by: Vadym Doroshenko <dvadym@chromium.org>
Commit-Queue: Friedrich Horschig <fhorschig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#548797}

components/password_manager/core/common/password_manager_features.cc

@@ -73,7 +73,7 @@ const base::Feature kPasswordImport = {"PasswordImport",
 
 // Allows searching for saved passwords in the settings page on mobile devices.
 const base::Feature kPasswordSearchMobile = {"PasswordSearchMobile",
-                                             base::FEATURE_DISABLED_BY_DEFAULT};
+                                             base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Enables the experiment for the password manager to only fill on account
 // selection, rather than autofilling on page load, with highlighting of fields.