Enable Metered toggle by default

For release in M86

Bug: 1093135
Change-Id: Id42946691b02ddd3cc281546d3b20953a35ce16c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2317003Reviewed-by: James Vecore <vecore@google.com>
Commit-Queue: Steven Bennetts <stevenjb@chromium.org>
Cr-Commit-Position: refs/heads/master@{#791414}

chrome/common/chrome_features.cc

@@ -485,7 +485,7 @@ const base::Feature kMacSystemScreenCapturePermissionCheck{
 // Whether to show the Metered toggle in Settings, allowing users to toggle
 // whether to treat a WiFi or Cellular network as 'metered'.
 const base::Feature kMeteredShowToggle{"MeteredShowToggle",
-                                       base::FEATURE_DISABLED_BY_DEFAULT};
+                                       base::FEATURE_ENABLED_BY_DEFAULT};
 #endif
 
 #if BUILDFLAG(ENABLE_EXTENSIONS)