Attempt to fix gpg package signing (redux).
Attempt to fix gpg package signing (redux).

The semantics for gpg seem to vary in subtle way across systems. This
attempts to identify the key fingerprint on import, since listing the
secret keys afterwards does not appear to have the intended effect.

PiperOrigin-RevId: 432067329

google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor,google/gvisor