arc-notifications: Allow app icons to be visible in arc-notifications

This was caused by shelf icon visibility being set on an empty row in
NotificationEntry

Test: None
Bug: 171839585
Change-Id: I5ea4ccd34ca489fba6b5a83c39718d0d8bf149d2

packages/SystemUI/src/com/android/systemui/statusbar/notification/collection/NotificationEntry.java

@@ -938,6 +938,7 @@ public final class NotificationEntry extends ListEntry {
 
     /** Whether or not the icon for this notification is visible in the shelf. */
     public void setShelfIconVisible(boolean shelfIconVisible) {
+        if (row == null) return;
         mShelfIconVisible = shelfIconVisible;
         updateShelfIconVisibility();
     }