Add person support for Waze Travel Time

[Petro31]

Adds person to the list of TRACKABLE_DOMAINS domains. _get_location_from_entity will handle the person domain without any changes.

Description:

Related issue (if applicable): fixes #

Pull request in home-assistant.io with documentation (if applicable): home-assistant/home-assistant.io#<home-assistant.io PR number goes here>

Example entry for configuration.yaml (if applicable):

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 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.

[balloob]

Fine with this change.

It would have been nice if users would have been able to define either an origin_entity or an origin_text, so that we didn't had to filter on trackable domains. I would expect any entity with a location to be allowed to use really.

[Petro31]

@balloob Yes, I agree. I'll look into making those changes. I wanted to refactor this to fit the new component model too.