Avatar: Add ASHA test - test_music_stop_dual_device

        # ref_left already connected, otherstate = 1

        assert_equal(start_result_right['otherstate'], 1)

    @asynchronous

    async def test_music_stop_dual_device(self) -> None:

        """

        DUT discovers Refs.

        DUT initiates connection to Refs.

        Verify that DUT and Refs are bonded and connected.

        DUT is streaming media to Refs.

        DUT stops media streaming on Refs.

        Verify that DUT sends a correct AudioControlPoint `Stop` command.

        Verify Refs cannot recevice audio data after DUT stops media streaming.

        """

        async def ref_device_connect(ref_device: BumblePandoraDevice, ear: Ear) -> Tuple[Connection, Connection]:

            advertisement = await self.ref_advertise_asha(ref_device=ref_device, ref_address_type=RANDOM, ear=ear)

            ref = await self.dut_scan_for_asha(dut_address_type=RANDOM, ear=ear)

            # DUT initiates connection to ref_device.

            dut_ref, ref_dut = await self.dut_connect_to_ref(advertisement, ref, RANDOM)

            advertisement.cancel()

            return dut_ref, ref_dut

        # DUT starts connecting, pairing with the ref_left

        dut_ref_left, ref_left_dut = await ref_device_connect(self.ref_left, Ear.LEFT)

        (secure_left, wait_security_left) = await asyncio.gather(

            self.dut.aio.security.Secure(connection=dut_ref_left, le=LE_LEVEL3),

            self.ref_left.aio.security.WaitSecurity(connection=ref_left_dut, le=LE_LEVEL3),

        )

        assert_equal(secure_left.result_variant(), 'success')

        assert_equal(wait_security_left.result_variant(), 'success')

        # DUT starts connecting, pairing with the ref_right

        dut_ref_right, ref_right_dut = await ref_device_connect(self.ref_right, Ear.RIGHT)

        (secure_right, wait_security_right) = await asyncio.gather(

            self.dut.aio.security.Secure(connection=dut_ref_right, le=LE_LEVEL3),

            self.ref_right.aio.security.WaitSecurity(connection=ref_right_dut, le=LE_LEVEL3),

        )

        assert_equal(secure_right.result_variant(), 'success')

        assert_equal(wait_security_right.result_variant(), 'success')

        dut_asha = AioAsha(self.dut.aio.channel)

        ref_left_asha = AioAsha(self.ref_left.aio.channel)

        ref_right_asha = AioAsha(self.ref_right.aio.channel)

        stop_future = self.get_stop_future(self.ref_left)

        await dut_asha.WaitPeripheral(connection=dut_ref_left)

        await dut_asha.WaitPeripheral(connection=dut_ref_right)

        await dut_asha.Start(connection=dut_ref_left)

        logging.info("send stop")

        _, stop_result = await asyncio.gather(dut_asha.Stop(), asyncio.wait_for(stop_future, timeout=10.0))

        logging.info(f"stop_result:{stop_result}")

        assert_is_not_none(stop_result)

        (audio_data_left, audio_data_right) = await asyncio.gather(

            self.get_audio_data(ref_asha=ref_left_asha, connection=ref_left_dut, timeout=10),

            self.get_audio_data(ref_asha=ref_right_asha, connection=ref_right_dut, timeout=10),

        )

        assert_equal(len(audio_data_left), 0)

        assert_equal(len(audio_data_right), 0)

    @asynchronous

    async def test_music_audio_playback(self) -> None:

        """