As part of the iOS 15, iPadOS 15 and macOS Monterey seeding, Apple has also released a framework called "ShazamKit for Android".
It is a 2.53mb ZIP file.
The file contains a website and other documents explaining what it is:
This can be downloaded by Apple Developers on the Apple Developer website.
I am not sure how Android developers would download it without a developer account. Also not sure if this needs to be a paid account or not (Mine is an enterprise account)
EDIT:
The official page is now public: https://developer.apple.com/shazamkit/