Update android codelab to fix unpacking error (#66)

doc/android-guide.md

@@ -100,7 +100,7 @@ class CodelabTest(base_test.BaseTestClass): # type: ignore[misc]
     # Method to set up the DUT and REF devices for the test (called once).
     def setup_class(self) -> None:
         self.devices = PandoraDevices(self)  # Create Pandora devices from the config.
-        self.dut, ref = self.devices
+        self.dut, ref, *_ = self.devices
         assert isinstance(ref, BumblePandoraClient)  # REF device is a Bumble device.
         self.ref = ref