Add ARC feature flags for Chrome OS

This adds four ARC feature flags that are needed by arcvm-launch to
determine what commandline parameters should be passed to the Android
kernel.

BUG=b:136128691
TEST=dbus-send

Change-Id: If7e189977d4f289a4278df21ef995d6f8fcc2664
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1695737Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Chris Morin <cmtm@chromium.org>
Cr-Commit-Position: refs/heads/master@{#676620}

chrome/browser/chromeos/dbus/chrome_features_service_provider.cc

@@ -17,6 +17,7 @@
 #include "chrome/browser/chromeos/profiles/profile_helper.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/common/chrome_features.h"
+#include "components/arc/arc_features.h"
 #include "dbus/bus.h"
 #include "dbus/message.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
@@ -106,7 +107,10 @@ void ChromeFeaturesServiceProvider::IsFeatureEnabled(
     dbus::MethodCall* method_call,
     dbus::ExportedObject::ResponseSender response_sender) {
   static const base::Feature constexpr* kFeatureLookup[] = {
-      &features::kUsbbouncer, &features::kUsbguard};
+      &features::kUsbbouncer, &features::kUsbguard,
+      &arc::kNativeBridgeExperimentFeature, &arc::kFilePickerExperimentFeature,
+      &arc::kCustomTabsExperimentFeature, &arc::kPrintSpoolerExperimentFeature,
+  };
 
   dbus::MessageReader reader(method_call);
   std::string feature_name;