Foreground service notis must be correctly formed.

If an app targets api 26, it needs a notification channel, even for
foreground service notifications.

Change-Id: Id3131d4bb2748e9d23f66dd4f5570842bc50a44f
Fixes: 66905243
Test: manual
diff --git a/services/core/java/com/android/server/notification/NotificationManagerInternal.java b/services/core/java/com/android/server/notification/NotificationManagerInternal.java
index 4923b06..f1476b3 100644
--- a/services/core/java/com/android/server/notification/NotificationManagerInternal.java
+++ b/services/core/java/com/android/server/notification/NotificationManagerInternal.java
@@ -17,8 +17,10 @@
 package com.android.server.notification;
 
 import android.app.Notification;
+import android.app.NotificationChannel;
 
 public interface NotificationManagerInternal {
+    NotificationChannel getNotificationChannel(String pkg, int uid, String channelId);
     void enqueueNotification(String pkg, String basePkg, int callingUid, int callingPid,
             String tag, int id, Notification notification, int userId);