register voice interaction preference.

chrome/browser/chromeos/arc/arc_session_manager.cc

Index: chrome/browser/chromeos/arc/arc_session_manager.cc
diff --git a/chrome/browser/chromeos/arc/arc_session_manager.cc b/chrome/browser/chromeos/arc/arc_session_manager.cc
index 3226fc6a49131de633b5777b031c8cde092d6f01..fa9f88c26a0b25846513b619932707306eb43ff1 100644
--- a/chrome/browser/chromeos/arc/arc_session_manager.cc
+++ b/chrome/browser/chromeos/arc/arc_session_manager.cc
@@ -173,6 +173,9 @@ void ArcSessionManager::RegisterProfilePrefs(
   registry->RegisterBooleanPref(prefs::kArcTermsAccepted, false);
   registry->RegisterBooleanPref(prefs::kArcVoiceInteractionValuePropAccepted,
                                 false);
+  registry->RegisterBooleanPref(prefs::kVoiceInteractionEnabled, false);
+  registry->RegisterBooleanPref(prefs::kVoiceInteractionContextEnabled, false);
+  registry->RegisterBooleanPref(prefs::kVoiceInteractionPrefSynced, false);
   // Note that ArcBackupRestoreEnabled and ArcLocationServiceEnabled prefs have
   // to be off by default, until an explicit gesture from the user to enable
   // them is received. This is crucial in the cases when these prefs transition