fix: Add missing type administrative_area_level_6 and administrative_area_level_7

[gpradhan27]

This PR adds the missing AddressComponentType administrative_area_level_6 and administrative_area_level_7 - the java doc comments for enum types were copied from https://developers.google.com/maps/documentation/geocoding/requests-geocoding , hope this is the correct one.

---

Before submitting your PR, there are a few things you can do to make sure it goes smoothly:

• [x] Make sure to open a GitHub issue as a bug/feature request before writing your code! That way we can discuss the change, evaluate designs, and agree on the general idea
• [x] Ensure the tests and linter pass
• [x] Code coverage does not decrease (if any source code was changed)
• [x] Appropriate docs were updated (if necessary)

Fixes #985 🦕

[gpradhan27]

hi @wangela could you please review this?

[pantelis-goku]

@amuramoto Do we plan to integrate the changes for the additional administrative levels? cc @gpradhan27

• administrative_area_level_6
• administrative_area_level_7

[amuramoto]

@amuramoto Do we plan to integrate the changes for the additional administrative levels? cc @gpradhan27

• administrative_area_level_6
• administrative_area_level_7

Unfortunately I'm not a maintainer on this repo anymore so I can't accept PRs.

[pantelis-goku]

@amuramoto Do you happen to know who the maintainer is now? Is the project still supported?

[amuramoto]

I believe that would be @wangela

[fotag]

Thanks @amuramoto! @wangela Is this correct? If not, do you know if this client is still maintained by Google?

I believe that would be @wangela

[gpradhan27]

hi @wangela any update on this?