Define websocket foreground service type

Author: cyb3rko

app/src/main/AndroidManifest.xml

@@ -10,6 +10,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
     <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM" />
+    <uses-permission android:name="android.permission.FOREGROUND_SERVICE_SPECIAL_USE" />
 
     <application
         android:name=".GotifyApplication"
@@ -73,7 +74,13 @@
             android:exported="false"
             android:theme="@style/AppTheme.Dialog" />
 
-        <service android:name=".service.WebSocketService" />
+        <service
+            android:name=".service.WebSocketService"
+            android:foregroundServiceType="specialUse">
+            <property
+                android:name="android.app.PROPERTY_SPECIAL_USE_FGS_SUBTYPE"
+                android:value="explanation_for_special_use" />
+        </service>
 
         <receiver android:name=".init.BootCompletedReceiver"
             android:exported="true">

app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt

@@ -6,6 +6,7 @@ import android.app.NotificationManager
 import android.app.PendingIntent
 import android.app.Service
 import android.content.Intent
+import android.content.pm.ServiceInfo
 import android.graphics.Color
 import android.net.ConnectivityManager
 import android.net.Network
@@ -285,7 +286,15 @@ internal class WebSocketService : Service() {
 
         notificationBuilder.setContentIntent(pendingIntent)
         notificationBuilder.color = ContextCompat.getColor(applicationContext, R.color.colorPrimary)
-        startForeground(NotificationSupport.ID.FOREGROUND, notificationBuilder.build())
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.UPSIDE_DOWN_CAKE) {
+            startForeground(
+                NotificationSupport.ID.FOREGROUND,
+                notificationBuilder.build(),
+                ServiceInfo.FOREGROUND_SERVICE_TYPE_SPECIAL_USE
+            )
+        } else {
+            startForeground(NotificationSupport.ID.FOREGROUND, notificationBuilder.build())
+        }
     }
 
     private fun showNotification(