feat: add a splash screen (need test on android)

Author: BrightDV

android/app/src/main/java/io/flutter/plugins/GeneratedPluginRegistrant.java

@@ -40,6 +40,11 @@ public static void registerWith(@NonNull FlutterEngine flutterEngine) {
     } catch (Exception e) {
       Log.e(TAG, "Error registering plugin flutter_inappwebview_android, com.pichillilorenzo.flutter_inappwebview_android.InAppWebViewFlutterPlugin", e);
     }
+    try {
+      flutterEngine.getPlugins().add(new net.jonhanson.flutter_native_splash.FlutterNativeSplashPlugin());
+    } catch (Exception e) {
+      Log.e(TAG, "Error registering plugin flutter_native_splash, net.jonhanson.flutter_native_splash.FlutterNativeSplashPlugin", e);
+    }
     try {
       flutterEngine.getPlugins().add(new io.github.ponnamkarthik.toast.fluttertoast.FlutterToastPlugin());
     } catch (Exception e) {