feat(media_player): foreground tier in the state ladder with app-source now-playing (last-known → last_channel → audio hint), sensor reads the store's foreground priority chain (P3-3a,c)

custom_components/nvidia_shield/sensor.py

@@ -105,9 +105,13 @@ class NvidiaShieldCurrentAppSensor(NvidiaShieldSensorBase):
         if state:
             return state.attributes.get("app_name") or state.attributes.get("app_id")
 
-        # androidtv entity unavailable — StateStore fallback (ADB recents)
+        # androidtv entity unavailable — StateStore priority chain (P3-3c):
+        # protocol current_app push → ADB mResumedActivity → ADB recents
         manager = self._manager()
         if manager is not None:
+            foreground = manager.foreground_app
+            if foreground:
+                return foreground
             running = manager.running_apps
             if running:
                 return running[0].get("package")