Adding motion sensor

[alandtse]

Description:

Adds a motion sensor event

Related issue (if applicable): fixes #

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#5414

Example entry for configuration.yaml (if applicable):

doorbird:
  host: DOORBIRD_IP
  username: !secret doorbird_user
  password: !secret doorbird_password
  doorbell_events: true
  motion_events: true
  hass_url_override: https://HASS_IP:8123

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

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

• Documentation added/updated in home-assistant.github.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 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]

Please have a look at #13994. Is this a duplicate?

[alandtse]

@syssi Well dang. Yes it is. Closing this.