Strip attributes whitespace in universal media_player (#54451)

When using whitespace in attributes the lookup of the state attribute fails because an entity with whitespace in its name cannot be found.

Works:
entity_id|state_attribute

Does not work:
entity_id | state_attribute

Fixes #53804

homeassistant/components/universal/media_player.py

@@ -158,7 +158,7 @@ class UniversalMediaPlayer(MediaPlayerEntity):
         self._cmds = commands
         self._attrs = {}
         for key, val in attributes.items():
-            attr = val.split("|", 1)
+            attr = list(map(str.strip, val.split("|", 1)))
             if len(attr) == 1:
                 attr.append(None)
             self._attrs[key] = attr