[Google Hotels API] Provide a shared ID with other Google APIs

[schaferyan]

One of our Enterprise customers reached out to ask about a canonical ID that could be retrieved with one of the other Google APIs, and used to search Google Hotels.

Examples of ways to support this might be the ability to search Google Hotels using a Google Maps place_id or data_cid, or providing a property_token in Google Maps results. I've let them know we can only support a shared ID if Google provides one.

Here's a few examples of what this could look like in the Playground:

Other issues where users have requested a shared ID between different Google APIs:

• [Google Local Results API] Scrape reviews for Google Local Results #2243
• [Google Local Services API and Google Maps API] Provide a Shared ID #1127

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