title: Flutter: package com.it_nomads.fluttersecurestorage does not exist
body: <p>I met a problem where when I build the application, it shows there is error where the package is not exists. I am using the example code that provided at pub dev of the dependency <code>flutter_secure_storage</code>. I have already change the <code>minSdkVersion</code> to 18.</p>
  <p>Can I know is there any ways to fix this problem?</p>
  <pre><code>android\app\src\main\java\io\flutter\plugins\GeneratedPluginRegistrant.java:16: error: package com.it_nomads.fluttersecurestorage does not exist
      flutterEngine.getPlugins().add(new com.it_nomads.fluttersecurestorage.FlutterSecureStoragePlugin());
                                                                           ^
  1 error
  </code></pre>
  <p>My <code>flutter doctor -v</code></p>
  <pre><code>[√] Flutter (Channel stable, 2.2.1, on Microsoft Windows [Version 10.0.18363.1440], locale en-MY)
      • Flutter version 2.2.1 at C:\Users\nurfa\flutter
      • Framework revision 02c026b03c (6 days ago), 2021-05-27 12:24:44 -0700
      • Engine revision 0fdb562ac8
      • Dart version 2.13.1
  
  [√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
      • Android SDK at C:\Users\nurfa\AppData\Local\Android\sdk
      • Platform android-30, build-tools 30.0.3
      • Java binary at: C:\ProgramData\Oracle\Java\javapath\java.exe
      • Java version Java(TM) SE Runtime Environment (build 1.8.0_161-b12)
      • All Android licenses accepted.
  
  [√] Chrome - develop for the web
      • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe
  
  [!] Android Studio (not installed)
      • Android Studio not found; download from https://developer.android.com/studio/index.html
        (or visit https://flutter.dev/docs/get-started/install/windows#android-setup for detailed instructions).
  
  [√] IntelliJ IDEA Community Edition (version 2021.1)
      • IntelliJ at C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2021.1
      • Flutter plugin can be installed from:
         https://plugins.jetbrains.com/plugin/9212-flutter
      • Dart plugin can be installed from:
         https://plugins.jetbrains.com/plugin/6351-dart
  
  [√] VS Code (version 1.56.2)
      • VS Code at C:\Users\nurfa\AppData\Local\Programs\Microsoft VS Code
      • Flutter extension version 3.23.0
  
  [√] Connected device (3 available)
      • COR L29 (mobile) • XTX7N18B29009354 • android-arm64  • Android 9 (API 28)
      • Chrome (web)     • chrome           • web-javascript • Google Chrome 91.0.4472.77
      • Edge (web)       • edge             • web-javascript • Microsoft Edge 90.0.818.51
  </code></pre>