The playback.protocol_v3_enabled flag shipped seeded to 'false' as a
rollout safety valve and was never exposed in any settings UI. Current
Android clients are v3-only for video, so against a server with the
flag off they refuse playback with a misleading "update your server"
error even on the newest image. Flip the flag to 'true' everywhere.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
