feat: option, privacy mode

Signed-off-by: fufesou <linlong1266@gmail.com>

protos/message.proto

@@ -635,6 +635,7 @@ message PermissionInfo {
     Restart = 5;
     Recording = 6;
     BlockInput = 7;
+    PrivacyMode = 8;
   }
 
   Permission permission = 1;

protos/rendezvous.proto

@@ -44,6 +44,7 @@ message ControlPermissions {
     recording = 9;
     block_input = 10;
     remote_modify = 11;
+    privacy_mode = 12;
   }
   uint64 permissions = 1;
 }