Show "Waiting for opponent..." while you wait for the other player to choose whether to go first or keep their first hand

forge-ai/src/main/java/forge/ai/PlayerControllerAi.java

@@ -872,4 +872,13 @@ public class PlayerControllerAi extends PlayerController {
     public void autoPassCancel() {
         // Do nothing
     }
+
+    @Override
+    public void awaitNextInput() {
+        // Do nothing
+    }
+    @Override
+    public void cancelAwaitNextInput() {
+        // Do nothing
+    }
 }