ci: test on Android
https://github.com/quinn-rs/quinn/pull/1950 adds a GitHub job, testing quinn on Android.
Neqo doesn't have much platform specific code other than:
https://github.com/mozilla/neqo/blob/c80630baa4c9d9a5fcab157efe8c1394f5204971/neqo-crypto/build.rs#L226-L229
That said, Neqo's dependencies have platform dependent code and Android is a tier 1 Firefox build target.
Objections to adding the same CI job to Neqo?
No objections. Is it much slower than our other CI tests?
Running all quinn unit tests takes about 5 minutes, including dependency installation, build and emulator startup.
Let's do a PR and see how long it takes.
Are there other targets we should be testing on?
@mxinden those actions should now be available: https://bugzilla.mozilla.org/show_bug.cgi?id=1931529