Fix SaveCurrentScreenshot

This fixes SaveCurrentScreenshot so it correctly saves the screenshot into the screenshot folder, it's no longer a stub

I was going to add the capture button so all games worked but tbh I only care for spongebob

games tested
Pokemon Z-A: https://files.raychu.xyz/u/1FaUGV.png
Pokemon Violet: https://files.raychu.xyz/u/6swfVS.png
Pokemon Violet: https://files.raychu.xyz/u/JaBBX2.png
Spongebob The Cosmic Shake: https://files.raychu.xyz/u/8z5X2e.png

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/ISelfController.cs

@@ -416,7 +416,7 @@ namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.Sys
                 return ResultCode.InvalidParameters;
             }
 
-            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { albumReportOption });
+            context.Device.UIHandler.TakeScreenshot();
 
             return ResultCode.Success;
         }

src/Ryujinx.HLE/UI/IHostUIHandler.cs

@@ -60,5 +60,10 @@ namespace Ryujinx.HLE.UI
         /// Gets fonts and colors used by the host.
         /// </summary>
         IHostUITheme HostUITheme { get; }
+
+        /// <summary>
+        /// Takes a screenshot from the current renderer and saves it in the screenshots folder.
+        /// </summary>
+        void TakeScreenshot();
     }
 }

src/Ryujinx/Headless/WindowBase.cs

@@ -571,5 +571,10 @@ namespace Ryujinx.Headless
                 SDL2Driver.Instance.Dispose();
             }
         }
+
+        public void TakeScreenshot()
+        {
+            throw new NotImplementedException();
+        }
     }
 }

src/Ryujinx/UI/Applet/AvaHostUIHandler.cs

@@ -260,5 +260,10 @@ namespace Ryujinx.Ava.UI.Applet
         {
             return new AvaloniaDynamicTextInputHandler(_parent);
         }
+        
+        public void TakeScreenshot()
+        {
+            _parent.ViewModel.AppHost.ScreenshotRequested = true;
+        }
     }
 }