Add SmartThings Binary Sensor platform

[andrewsayre]

Description:

Adds SmartThings Binary Sensor platform that represents SmartThings devices that have sensor-related capabilities. Highlights:

• Supports 9 different types of SmartThings capabilities (see code/docs for list)
• binary_sensor entities are automatically created for each capability supported by the device. Users will need to remove and reinstall the Home Assistant SmartApp/Automation in the SmartThings Classic mobile app if they have previously used this component.

Pull request in home-assistant.io with documentation: home-assistant/home-assistant.io#8388

Checklist:

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

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

• Documentation added/updated in home-assistant.io

If the code does not interact with devices:

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