keybase_daemon_rpc: check for libkb.NotFoundError
keybase_daemon_rpc: check for libkb.NotFoundError

AppStatusError is too general and matches for things like network issues.

Issue: KBFS-1070

keybase/client,keybase/client,keybase/kbfs,keybase/client,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/kbfs,keybase/kbfs,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client,keybase/client