keep service in same state after reboot

app/src/main/java/com/frostnerd/smokescreen/service/DnsVpnService.kt

@@ -9,7 +9,7 @@ import android.content.Context
 import android.content.Intent
 import android.content.pm.PackageManager
 import android.net.*
-import android.os.* import android.provider.Settings
+import android.os.*
 import android.system.OsConstants
 import android.util.Base64
 import androidx.core.app.NotificationCompat
@@ -166,6 +166,7 @@ class DnsVpnService : VpnService(), Runnable {
 
 
     override fun onCreate() {
+        getPreferences().startAppOnBoot = true
         super.onCreate()
         AbstractHttpsDNSHandle // Loads the known servers.
         AbstractTLSDnsHandle
@@ -401,6 +402,7 @@ class DnsVpnService : VpnService(), Runnable {
             when (intent.getSerializableExtra("command") as Command) {
                 Command.STOP -> {
                     log("Received STOP command.")
+                    getPreferences().startAppOnBoot = false
                     destroy()
                     stopForeground(true)
                     stopSelf()