Add a new click_type double_both to improve the support of the new Xi…

[tedsluis]

…aomi aqara Wireless Wall Switch (remote.b286acn01)

Description:

The binary_sensor component for xiaomi_qara does not support a click_type double_both for WXKG02LM, model b286acn01. This pull request will add the double_both.

Not sure how to prepare this pull request (first time for me within this project).
Related issue (if applicable):

https://community.home-assistant.io/t/no-xiaomi-aqara-wireless-switch-long-click-both-double-click-and-both-long-click-support/86746/2

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#7952

Example entry for configuration.yaml (if applicable):

automation:
  - alias: turn off light
    trigger: 
      platform: event
      event_type: xiaomi_aqara.click
      event_data:
        entity_id: binary_sensor.wall_switch_both_158d00027c19e9
        click_type: double_both
    condition:
      - condition: state
        entity_id: light.gateway_light_7c49ebb18b86
        state: 'on'
    action:
      service: light.turn_off
      entity_id: light.gateway_light_7c49ebb18b86

Checklist:

• [x ] The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass
• [x ] There is no commented out code in this PR.

If user exposed functionality or configuration variables are added/changed:

• [ x] Documentation added/updated in home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[syssi]

Good catch! Please extended the documentation, too!

[tedsluis]

Good catch! Please extended the documentation, too!

I tried to do a pull request for the documentation, but I am not sure whether it is okay:

home-assistant/home-assistant.io#7952