Shortcut fix Oreo (#1026)

* Moved to Android O Shortcutmanager

* Re-added possibility to change icon shape pre oreo.

app/src/main/java/eu/kanade/tachiyomi/data/notification/NotificationReceiver.kt

@@ -41,6 +41,8 @@ class NotificationReceiver : BroadcastReceiver() {
             ACTION_RESUME_DOWNLOADS -> DownloadService.start(context)
             // Clear the download queue
             ACTION_CLEAR_DOWNLOADS -> downloadManager.clearQueue(true)
+            // Show message notification created
+            ACTION_SHORTCUT_CREATED -> context.toast(R.string.shortcut_created)
             // Launch share activity and dismiss notification
             ACTION_SHARE_IMAGE -> shareImage(context, intent.getStringExtra(EXTRA_FILE_LOCATION),
                     intent.getIntExtra(EXTRA_NOTIFICATION_ID, -1))
@@ -161,6 +163,9 @@ class NotificationReceiver : BroadcastReceiver() {
         // Called to clear downloads.
         private const val ACTION_CLEAR_DOWNLOADS = "$ID.$NAME.ACTION_CLEAR_DOWNLOADS"
 
+        // Called to notify user shortcut is created.
+        private const val ACTION_SHORTCUT_CREATED = "$ID.$NAME.ACTION_SHORTCUT_CREATED"
+
         // Called to dismiss notification.
         private const val ACTION_DISMISS_NOTIFICATION = "$ID.$NAME.ACTION_DISMISS_NOTIFICATION"
 
@@ -199,6 +204,13 @@ class NotificationReceiver : BroadcastReceiver() {
             return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
         }
 
+        internal fun shortcutCreatedBroadcast(context: Context) : PendingIntent {
+            val intent = Intent(context, NotificationReceiver::class.java).apply {
+                action = ACTION_SHORTCUT_CREATED
+            }
+            return PendingIntent.getBroadcast(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT)
+        }
+
         /**
          * Returns [PendingIntent] that starts a service which dismissed the notification
          *