Use userid of sender, not notification target.

When trying to find a package.

Bug: 33178040
Test: manual, ./vendor/google/tools/fake-ota on
Change-Id: I0b69c37f16e7e1763bff4df1650911fe3435bc77

core/java/android/service/notification/StatusBarNotification.java

@@ -246,7 +246,7 @@ public class StatusBarNotification implements Parcelable {
     }
 
     /**
-     * Returns a userHandle for the instance of the app that posted this notification.
+     * Returns a userid for whom this notification is intended.
      *
      * @deprecated Use {@link #getUser()} instead.
      */

services/core/java/com/android/server/notification/NotificationRecord.java

@@ -25,6 +25,7 @@ import android.app.Notification;
 import android.app.NotificationChannel;
 import android.content.Context;
 import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
@@ -136,15 +137,9 @@ public final class NotificationRecord {
     private boolean isPreChannelsNotification() {
         try {
             if (NotificationChannel.DEFAULT_CHANNEL_ID.equals(getChannel().getId())) {
-                final boolean isSystemNotification =
-                        NotificationManagerService.isUidSystem(sbn.getUid())
-                                || ("android".equals(sbn.getPackageName()));
-                if (isSystemNotification) {
-                    return false;
-                }
-                final ApplicationInfo applicationInfo =
+                  final ApplicationInfo applicationInfo =
                         mContext.getPackageManager().getApplicationInfoAsUser(sbn.getPackageName(),
-                                0, sbn.getUserId());
+                                0, UserHandle.getUserId(sbn.getUid()));
                 if (applicationInfo.targetSdkVersion <= Build.VERSION_CODES.N_MR1) {
                     return true;
                 }

services/core/java/com/android/server/notification/RankingHelper.java

@@ -784,11 +784,6 @@ public class RankingHelper implements RankingConfig {
         }
     }
 
-    private static boolean isUidSystem(int uid) {
-        final int appid = UserHandle.getAppId(uid);
-        return (appid == Process.SYSTEM_UID || appid == Process.PHONE_UID || uid == 0);
-    }
-
     private static class Record {
         static int UNKNOWN_UID = UserHandle.USER_NULL;