Cleanup: simplify stream by using List operations (desugar).

src/main/java/de/dennisguse/opentracks/data/TrackSelection.java

@@ -70,7 +70,7 @@ public class TrackSelection implements ContentProviderUtils.ContentProviderSelec
         ArrayList<String> args = trackIds.stream().map(id -> Long.toString(id.id())).collect(Collectors.toCollection(ArrayList::new));
         args.addAll(categories);
         args.addAll(fromToArgs);
-        selectionArgs = args.stream().toArray(String[]::new);
+        selectionArgs = args.toArray(String[]::new);
 
         return new SelectionData(selection, selectionArgs);
     }