Settings: added default sharing track file format.

Fixes #225.

src/main/java/de/dennisguse/opentracks/util/IntentUtils.java

@@ -92,9 +92,10 @@ public class IntentUtils {
             Track track = contentProviderUtils.getTrack(trackId);
             if (track == null) {
                 Log.e(TAG, "TrackId " + trackId + " could not be resolved.");
+                continue;
             }
 
-            Pair<Uri, String> uriAndMime = ShareContentProvider.createURI(new long[]{trackId}, track.getName(), TrackFileFormat.KMZ_WITH_TRACKDETAIL_AND_SENSORDATA_AND_PICTURES);
+            Pair<Uri, String> uriAndMime = ShareContentProvider.createURI(new long[]{trackId}, track.getName(), PreferencesUtils.getExportTrackFileFormat(context));
             uris.add(uriAndMime.first);
             mime = uriAndMime.second;
         }

src/main/java/de/dennisguse/opentracks/util/PreferencesUtils.java

@@ -24,6 +24,7 @@ import androidx.annotation.VisibleForTesting;
 import androidx.preference.PreferenceManager;
 
 import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.io.file.TrackFileFormat;
 
 /**
  * Utilities to access preferences stored in {@link SharedPreferences}.
@@ -320,6 +321,15 @@ public class PreferencesUtils {
         return getInt(context, R.string.recording_gps_accuracy_key, RECORDING_GPS_ACCURACY);
     }
 
+    public static TrackFileFormat getExportTrackFileFormat(Context context) {
+        String trackFileFormatName = getString(context, R.string.export_trackfileformat_key, null);
+        try {
+            return TrackFileFormat.valueOf(trackFileFormatName);
+        } catch (Exception e) {
+            return TrackFileFormat.KML_ONLY_TRACK;
+        }
+    }
+
     public static boolean isRecording(Context context) {
         long recordingTrackId = getRecordingTrackId(context);
         return isRecording(recordingTrackId);