access: support new "default" pipewire.access value

The "default" access is used for normal clients, in the use case where
Pipewire server will not assign permissions itself but leaves it to the
session manager. In this use case only session manager has
"unrestricted".

Make "default" equal to "unrestricted" in the default access
configuration.

src/config/wireplumber.conf.d/access.conf

@@ -40,4 +40,14 @@ wireplumber.settings = {
         default_permissions = "rx"
       }
     }
+    {
+      matches = [
+        {
+          pipewire.access = "default"
+        }
+      ]
+      update-props = {
+        default_permissions = "all"
+      }
+    }
   ]

src/scripts/client/access-default.lua

@@ -15,6 +15,8 @@ function getDefaultPermissions (properties)
     return "all"
   elseif pw_access == "flatpak" or pw_access == "restricted" then
     return "rx"
+  elseif pw_access == "default" then
+    return "all"
   end
 
   return nil