Chore: [ALAS] Abstract has_cached_image

module/device/screenshot.py

@@ -72,6 +72,10 @@ class Screenshot(Adb, WSA, DroidCast, AScreenCap, Scrcpy, NemuIpc):
 
         return self.image
 
+    @property
+    def has_cached_image(self):
+        return hasattr(self, 'image') and self.image is not None
+
     def _handle_orientated_image(self, image):
         """
         Args: