There is an updated pull request by pbui against master on the void-packages repository

https://github.com/pbui/void-packages python-google-api-python-client
https://github.com/void-linux/void-packages/pull/22227

python3-google-api-python-client: add missing dependency
Some of the common API modules were split out into a core library which is missing as a dependency.

A patch file from https://github.com/void-linux/void-packages/pull/22227.patch is attached