Was gitignored under the assumption it should be redownloaded per
clone, but a cloud EAS build clones from git and won't see a gitignored
file at all — the build would fail without it (app.json's
android.googleServicesFile references this path). Its contents (API
key, app/project IDs) aren't secret: Google restricts access by
package name and SHA fingerprint, not by hiding the file, same as most
public Firebase Android repos.
