De-dupe shortcuts with the same id as the main notification.

- Pass NotificationKeyData, which includes the shortcut id, instead of
  just the notification key from NotificationListener
- Remove the shortcut with the same shortcut id as the first
  notification, if it has one, in PopupPopulator#sortAndFilterShorcuts()
- Add some unit tests

Bug: 36571718
Change-Id: I308941b34c525b34686583476e3f82ccb8b7e2d8

src/com/android/launcher3/notification/NotificationKeyData.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.notification;
+
+import android.service.notification.StatusBarNotification;
+import android.support.annotation.NonNull;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * The key data associated with the notification, used to determine what to include
+ * in badges and dummy popup views before they are populated.
+ *
+ * @see NotificationInfo for the full data used when populating the dummy views.
+ */
+public class NotificationKeyData {
+    public final String notificationKey;
+    public final String shortcutId;
+
+    private NotificationKeyData(String notificationKey, String shortcutId) {
+        this.notificationKey = notificationKey;
+        this.shortcutId = shortcutId;
+    }
+
+    public static NotificationKeyData fromNotification(StatusBarNotification sbn) {
+        return new NotificationKeyData(sbn.getKey(), sbn.getNotification().getShortcutId());
+    }
+
+    public static List<String> extractKeysOnly(@NonNull List<NotificationKeyData> notificationKeys) {
+        List<String> keysOnly = new ArrayList<>(notificationKeys.size());
+        for (NotificationKeyData notificationKeyData : notificationKeys) {
+            keysOnly.add(notificationKeyData.notificationKey);
+        }
+        return keysOnly;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (!(obj instanceof NotificationKeyData)) {
+            return false;
+        }
+        // Only compare the keys.
+        return ((NotificationKeyData) obj).notificationKey.equals(notificationKey);
+    }
+}