Fix assist for hardware long-press

Activating the assistant will now route through SysUI, so
we have the logic whether to start an activity or to start a voice
interaction session in one single place.

Bug: 22201770
Change-Id: I0f4699533aea2a1e595ee25a844434c82f548c01
diff --git a/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java b/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
index 4692403..130815e 100644
--- a/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
+++ b/services/core/java/com/android/server/statusbar/StatusBarManagerInternal.java
@@ -16,6 +16,8 @@
 
 package com.android.server.statusbar;
 
+import android.os.Bundle;
+
 import com.android.server.notification.NotificationDelegate;
 
 public interface StatusBarManagerInternal {
@@ -25,4 +27,5 @@
     void notificationLightOff();
     void showScreenPinningRequest();
     void showAssistDisclosure();
+    void startAssist(Bundle args);
 }