How add a views page url to the admin_menu? I tried creating a view with a page display, giving it a normal menu item in navigation, the url admin/people/allusers (or any url like admin/content/listing), clearing the caches, but the admin menu does not pick up the page and put it in the drop downs.

How do I do this without having to use hook_menu for each views page url I want in the admin menu bar?
The link needs to get added to the Management menu to show up in admin_menu. 

You can add a admin menu link on:
http://example.com/admin/structure/menu/manage/management

Or through the interface at : Structure->Menus->Management->Add Links