Disable keyboard controller input while swkbd is open (foreground) (#6646)

* Block input updates while swkbd is open in foreground mode

* Flush internal driver state before unblocking input updates

* Rename Flush to Clear and remove unnecessary attribute

src/Ryujinx.Input/HLE/NpadManager.cs

@@ -174,6 +174,11 @@ namespace Ryujinx.Input.HLE
         {
             lock (_lock)
             {
+                foreach (InputConfig inputConfig in _inputConfig)
+                {
+                    _controllers[(int)inputConfig.PlayerIndex].GamepadDriver.Clear();
+                }
+
                 _blockInputUpdates = false;
             }
         }

src/Ryujinx.Input/IGamepadDriver.cs

@@ -33,5 +33,11 @@ namespace Ryujinx.Input
         /// <param name="id">The unique id of the gamepad</param>
         /// <returns>An instance of <see cref="IGamepad"/> associated to the gamepad id given or null if not found</returns>
         IGamepad GetGamepad(string id);
+
+        /// <summary>
+        /// Flush the internal state of the driver.
+        /// </summary>
+        /// <remarks>Does nothing by default.</remarks>
+        void Clear() { }
     }
 }