Fix null service intent issue

app/src/main/java/org/traccar/client/AutostartReceiver.java

@@ -22,13 +22,13 @@ import android.preference.PreferenceManager;
 import android.support.v4.content.WakefulBroadcastReceiver;
 
 public class AutostartReceiver extends WakefulBroadcastReceiver {
-	
+    
     @Override
     public void onReceive(Context context, Intent intent) {
-    	SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
-    	if (sharedPreferences.getBoolean(MainActivity.KEY_STATUS, false)) {
-    		context.startService(new Intent(context, TrackingService.class));
-    	}
+        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+        if (sharedPreferences.getBoolean(MainActivity.KEY_STATUS, false)) {
+            startWakefulService(context, new Intent(context, TrackingService.class));
+        }
     }
 
 }

app/src/main/java/org/traccar/client/TrackingService.java

@@ -53,7 +53,9 @@ public class TrackingService extends Service {
     @SuppressWarnings("deprecation")
     @Override
     public void onStart(Intent intent, int startId) {
-        AutostartReceiver.completeWakefulIntent(intent);
+        if (intent != null) {
+            AutostartReceiver.completeWakefulIntent(intent);
+        }
 
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.ECLAIR && foreground) {
             Intent notificationIntent = new Intent(this, MainActivity.class);