support changing primary user id in SaveKeyringParcel

Closes #695

OpenKeychain/src/main/res/values/strings.xml

@@ -628,6 +628,8 @@
     <string name="msg_mf_error_encode">Encoding exception!</string>
     <string name="msg_mf_error_fingerprint">Actual key fingerprint does not match expected!</string>
     <string name="msg_mf_error_keyid">No keyid. This is a programming error, please file a bug report!</string>
+    <string name="msg_mf_error_integrity">Internal error, integrity check failed!</string>
+    <string name="msg_mf_error_revoked_primary">Revoked user ids cannot be primary!</string>
     <string name="msg_mf_error_pgp">PGP internal exception!</string>
     <string name="msg_mf_error_sig">Signature exception!</string>
     <string name="msg_mf_passphrase">Changing passphrase</string>