helium/core: webrtc "public interface only" default policy (#371)

closes #308
closes #360

patches/helium/core/webrtc-default-handling-policy.patch

@@ -1,11 +1,11 @@
 --- a/chrome/browser/ui/browser_ui_prefs.cc
 +++ b/chrome/browser/ui/browser_ui_prefs.cc
-@@ -137,7 +137,7 @@ void RegisterBrowserUserPrefs(user_prefs
+@@ -147,7 +147,7 @@ void RegisterBrowserUserPrefs(user_prefs
                                  false);
  #endif
    registry->RegisterStringPref(prefs::kWebRTCIPHandlingPolicy,
 -                               blink::kWebRTCIPHandlingDefault);
-+                               blink::kWebRTCIPHandlingDisableNonProxiedUdp);
++                               blink::kWebRTCIPHandlingDefaultPublicInterfaceOnly);
    registry->RegisterListPref(prefs::kWebRTCIPHandlingUrl, base::Value::List());
    registry->RegisterBooleanPref(prefs::kWebRTCPostQuantumKeyAgreement, false);
    registry->RegisterStringPref(prefs::kWebRTCUDPPortRange, std::string());

patches/series

@@ -91,7 +91,6 @@ extra/ungoogled-chromium/add-flag-to-hide-extensions-menu.patch
 extra/ungoogled-chromium/add-flag-to-hide-fullscreen-exit-ui.patch
 extra/ungoogled-chromium/add-flag-for-incognito-themes.patch
 extra/ungoogled-chromium/add-flags-for-referrer-customization.patch
-extra/ungoogled-chromium/default-webrtc-ip-handling-policy.patch
 extra/ungoogled-chromium/add-flags-for-existing-switches.patch
 extra/ungoogled-chromium/add-flag-to-reduce-system-info.patch
 extra/ungoogled-chromium/add-flag-to-remove-client-hints.patch
@@ -179,6 +178,7 @@ helium/core/open-new-tabs-next-to-active-tab-option.patch
 helium/core/disable-update-toast.patch
 helium/core/disable-fedcm-bubble.patch
 helium/core/add-middle-click-autoscroll-flag.patch
+helium/core/webrtc-default-handling-policy.patch
 
 helium/settings/move-search-suggest.patch
 helium/settings/remove-autofill.patch