Only show "New" next to apps added in the last two weeks.

Previously, the definition of "New" was whether or not the added and
last updated dates were the same. This made sense, because we only
showed apps from the past few weeks (depending on preferences) as new.

Now that we show up to 200 apps in the first screen, regardless of age,
this check is no longer helpful.

app/src/main/java/org/fdroid/fdroid/views/categories/AppCardController.java

@@ -38,6 +38,12 @@ import org.fdroid.fdroid.views.apps.FeatureImage;
  *  + {@link R.id#featured_image} ({@link ImageView}, optional)
  */
 public class AppCardController extends RecyclerView.ViewHolder implements ImageLoadingListener, View.OnClickListener {
+
+    /**
+     * After this many days, don't consider showing the "New" tag next to an app.
+     */
+    private static final int DAYS_TO_CONSIDER_NEW = 14;
+
     @NonNull
     private final ImageView icon;
 
@@ -104,7 +110,7 @@ public class AppCardController extends RecyclerView.ViewHolder implements ImageL
         summary.setText(Utils.formatAppNameAndSummary(app.name, app.summary));
 
         if (newTag != null) {
-            if (app.added != null && app.lastUpdated != null && app.added.equals(app.lastUpdated)) {
+            if (isConsideredNew(app)) {
                 newTag.setVisibility(View.VISIBLE);
             } else {
                 newTag.setVisibility(View.GONE);
@@ -130,6 +136,15 @@ public class AppCardController extends RecyclerView.ViewHolder implements ImageL
         }
     }
 
+    private boolean isConsideredNew(@NonNull App app) {
+        //noinspection SimplifiableIfStatement
+        if (app.added == null || app.lastUpdated == null || !app.added.equals(app.lastUpdated)) {
+            return false;
+        }
+
+        return Utils.daysSince(app.added) <= DAYS_TO_CONSIDER_NEW;
+    }
+
     /**
      * When the user clicks/touches an app card, we launch the {@link AppDetails2} activity in response.
      */