Bugfix: idle time should start also if the first trackpoint with a location is stored.

Identified in #1898.

src/main/java/de/dennisguse/opentracks/services/TrackRecordingManager.java

@@ -197,6 +197,9 @@ public class TrackRecordingManager implements SharedPreferences.OnSharedPreferen
 
         if (trackPoint.hasLocation() && lastStoredTrackPointWithLocation == null) {
             insertTrackPoint(trackPoint, true);
+
+            handler.removeCallbacks(ON_IDLE);
+            handler.postDelayed(ON_IDLE, idleDuration.toMillis());
             return true;
         }