The originally envisioned distribution method, in fact, was "Send FSF a blank 9-track tape and they'll fill it and mail it back". Nor, obviously, does anything prevent someone who downloads this from Drive from mirroring it on GitHub or wherever.

This is arguably bad stewardship of a historically open source project. It's certainly not a license violation.

There is plenty in Android which isn't the work of Google. For starters the Kotlin implementation and the Java implementation (OpenJDK).