Don't let players change their own gamemode without permission

Fixes #3191

core/src/main/java/org/geysermc/geyser/session/GeyserSession.java

@@ -1674,6 +1674,13 @@ public class GeyserSession implements GeyserConnection, CommandSender {
                 abilities.add(Ability.INSTABUILD);
             }
 
+            if (commandPermission == CommandPermission.OPERATOR) {
+                // Fixes a bug? since 1.19.11 where the player can change their gamemode in Bedrock settings and
+                // a packet is not sent to the server.
+                // https://github.com/GeyserMC/Geyser/issues/3191
+                abilities.add(Ability.OPERATOR_COMMANDS);
+            }
+
             if (flying || spectator) {
                 if (spectator && !flying) {
                     // We're "flying locked" in this gamemode