Cadence set to 0 when connected but user is not pedaling. Fixes #931.

Speed set to 0 when connected but last value is outdated. Fixes #930.
Bug: overflow when reset sensors (cadence and speed). Fixes #833.
Moving time stops when is not moving (the last track point is not moving) and restarts when last track point is moving.

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

@@ -172,6 +172,7 @@ class TrackRecordingManager {
                 insertTrackPoint(trackId, trackPoint);
 
                 isIdle = false;
+
                 lastTrackPoint = trackPoint;
                 return;
             }