Fix potential crashes when creating foreground service

app/src/main/java/de/kuschku/quasseldroid/util/service/BackendServiceConnection.kt

@@ -23,6 +23,7 @@ import android.content.ComponentName
 import android.content.Context
 import android.content.Intent
 import android.content.ServiceConnection
+import android.os.Build
 import android.os.IBinder
 import androidx.lifecycle.DefaultLifecycleObserver
 import androidx.lifecycle.LifecycleOwner
@@ -66,8 +67,12 @@ class BackendServiceConnection : ServiceConnection, DefaultLifecycleObserver {
   }
 
   fun start(intent: Intent = QuasselService.intent(context!!)) {
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+      context?.startForegroundService(intent)
+    } else {
       context?.startService(intent)
     }
+  }
 
   @Synchronized
   fun bind(intent: Intent = QuasselService.intent(context!!), flags: Int = 0) {