Updater: Don't show delete twice

* If an update exists and can be deleted, the action button AND the
  popup menu both show the delete action
* By checking wether the action already shows "Delete" we can hide
  that action from the submenu
* Additionally check for online availability to only hide it when it's
  not the last item - otherwise a click on the menu icon wouldn't do
  anything

Change-Id: Idc5da3962be4e0a69847f47b3c5f014b251bd438
diff --git a/app/src/main/java/org/lineageos/updater/UpdatesListAdapter.java b/app/src/main/java/org/lineageos/updater/UpdatesListAdapter.java
index e01825d..0956449 100644
--- a/app/src/main/java/org/lineageos/updater/UpdatesListAdapter.java
+++ b/app/src/main/java/org/lineageos/updater/UpdatesListAdapter.java
@@ -532,11 +532,15 @@
                 R.attr.actionOverflowMenuStyle, 0);
         popupMenu.inflate(R.menu.menu_action_mode);
 
+        boolean shouldShowDelete = canDelete;
+        boolean isVerified = update.getPersistentStatus() == UpdateStatus.Persistent.VERIFIED;
+        if (isVerified && !Utils.canInstall(update) && !update.getAvailableOnline()) {
+            shouldShowDelete = false;
+        }
         MenuBuilder menu = (MenuBuilder) popupMenu.getMenu();
-        menu.findItem(R.id.menu_delete_action).setVisible(canDelete);
+        menu.findItem(R.id.menu_delete_action).setVisible(shouldShowDelete);
         menu.findItem(R.id.menu_copy_url).setVisible(update.getAvailableOnline());
-        menu.findItem(R.id.menu_export_update).setVisible(
-                update.getPersistentStatus() == UpdateStatus.Persistent.VERIFIED);
+        menu.findItem(R.id.menu_export_update).setVisible(isVerified);
 
         popupMenu.setOnMenuItemClickListener(item -> {
             int itemId = item.getItemId();