Add median calibrations to package (#5340)

Author: 95-martin-orion

cirq-google/setup.py

@@ -72,6 +72,7 @@
         'cirq_google': ['py.typed'],
         'cirq_google.api.v2': ['*'],
         'cirq_google.api.v1': ['*'],
+        'cirq_google.devices.calibrations': ['*'],
         'cirq_google.devices.specifications': ['*'],
         'cirq_google.json_test_data': ['*'],
     },