bluetooth_AdapterPairing.mouse.pairing_twice tests fails due to the following reason 

"{'Round 1': ["[--- failed: test_connection_by_device ({'connection_seen_by_adapter': False, 'connection_by_device': True})]", "[--- failed: test_disconnection_by_device ({'disconnection_seen_by_adapter': True, 'disconnection_by_device': False})]"]}"

Failure link : 

https://stainless.corp.google.com/search?exclude_retried=true&first_date=2018-09-07&master_builder_name=&builder_name_number=&shard=&exclude_acts=true&builder_name=&master_builder_name_number=&owner=&retry=&exclude_cts=true&exclude_non_production=false&hostname=&board=&test=%5Ebluetooth_AdapterPairing%5C.mouse%5C.pairing_twice%24&suite=bluetooth_qualification%7Cbluetooth_chameleon%7Cbluetooth_sanity%7Cbluetooth_stress&build=%5ER71%5C-11066%5C.0%5C.0%24&status=FAIL&status=ERROR&status=ABORT&reason=&waterfall=&exclude_not_run=false&last_date=2018-09-17&exclude_non_release=true&exclude_au=true&model=&view=list

sample log:

09/15 00:55:24.193 ERROR|             utils:0287| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
09/15 00:55:51.243 ERROR|             utils:0287| [stderr] cat: /usr/local/autotest/.checksum: No such file or directory
09/15 00:56:02.211 ERROR|        base_label:0204| error getting label HWIDLabel.
Traceback (most recent call last):
  File "/usr/local/autotest/server/hosts/base_label.py", line 201, in get_labels
    labels.extend(label.get(host))
  File "/usr/local/autotest/server/hosts/base_label.py", line 81, in get
    return self.generate_labels(host)
  File "/usr/local/autotest/server/hosts/cros_label.py", line 583, in generate_labels
    self.key_file).get('labels', [])
  File "/usr/local/autotest/site_utils/hwid_lib.py", line 51, in get_hwid_info
    with open(key_file) as f:
IOError: [Errno 2] No such file or directory: '/usr/local/autotest/hwid_key'
09/15 00:56:02.228 ERROR|        base_label:0204| error getting label InternalDisplayLabel.
Traceback (most recent call last):
  File "/usr/local/autotest/server/hosts/base_label.py", line 201, in get_labels
    labels.extend(label.get(host))
  File "/usr/local/autotest/server/hosts/base_label.py", line 81, in get
    return self.generate_labels(host)
  File "/usr/local/autotest/server/hosts/cros_label.py", line 530, in generate_labels
    from autotest_lib.client.cros.graphics import graphics_utils
  File "/usr/local/autotest/client/cros/graphics/graphics_utils.py", line 24, in <module>
    import uinput
ImportError: No module named uinput
09/15 00:56:14.810 ERROR|bluetooth_adapter_:0062| Init: <Fault 1: "<class 'chameleond.utils.bluetooth_peripheral_kit.PeripheralKitException'>:Unexpected response in setting HID as service profile: ">
09/15 00:56:14.811 ERROR|bluetooth_adapter_:0116| Init failed the 1st time. Try to fix the serial device.
09/15 00:56:15.623 ERROR|bluetooth_adapter_:0062| EnterCommandMode: <Fault 1: "<class 'chameleond.utils.bluetooth_rn42.RN42Exception'>:Failure to get advertised name in entering command mode: Unexpected response in getting advertised name: .">
09/15 00:56:15.873 ERROR|bluetooth_adapter_:0062| GetAdvertisedName: <Fault 1: "<class 'chameleond.utils.bluetooth_peripheral_kit.PeripheralKitException'>:Unexpected response in getting advertised name: ">
09/15 00:56:15.873 ERROR|bluetooth_adapter_:0116| GetAdvertisedName failed the 1st time. Try to fix the serial device.
09/15 00:57:38.854 ERROR|             utils:2769| Timed out waiting for condition: Waiting for connection from 00:06:66:75:BA:91
09/15 00:57:38.855 ERROR|bluetooth_adapter_:0969| test_connection_by_device (adapter): Timed out waiting for condition: Waiting for connection from 00:06:66:75:BA:91
09/15 00:57:38.855 ERROR|bluetooth_adapter_:0309| test_connection_by_device failed at the 1st time.
09/15 00:58:15.985 ERROR|             utils:2769| Timed out waiting for condition: Waiting for connection from 00:06:66:75:BA:91
09/15 00:58:15.985 ERROR|bluetooth_adapter_:0969| test_connection_by_device (adapter): Timed out waiting for condition: Waiting for connection from 00:06:66:75:BA:91
09/15 00:58:15.986 ERROR|bluetooth_adapter_:0378| [--- failed: test_connection_by_device ({'connection_seen_by_adapter': False, 'connection_by_device': True})]
09/15 00:58:16.198 ERROR|bluetooth_adapter_:1004| test_disconnection_by_device (device): <Fault 1: "<class 'chameleond.utils.bluetooth_peripheral_kit.PeripheralKitException'>:Unexpected response in disconnecting from the remote device: ">
09/15 00:58:16.224 ERROR|bluetooth_adapter_:0309| test_disconnection_by_device failed at the 1st time.
09/15 00:58:18.008 ERROR|bluetooth_adapter_:0062| EnterCommandMode: <Fault 1: "<class 'chameleond.utils.bluetooth_rn42.RN42Exception'>:Failure to get advertised name in entering command mode: Unexpected response in getting advertised name: .">
09/15 00:58:18.008 ERROR|bluetooth_adapter_:0378| [--- failed: test_disconnection_by_device ({'disconnection_seen_by_adapter': True, 'disconnection_by_device': False})]