title: Build Warning : Mapping new ns to old ns
body: <p>So, I'm using Flutter and on running the App, I receive errors like these in the debug console:</p>
  <pre><code>Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01
  </code></pre>
  <p>I did <code>flutter clean</code>, but no effect.</p>
  <p>I tried the answer here:
  <a href="https://stackoverflow.com/questions/35951187/how-to-change-build-tools-version-in-android-studio">How to change build tools version in Android Studio</a></p>
  <p>But, when I look for <em>build.gradle</em> file, I have two files one in <em>/android</em> and another in <em>/android/app</em>. But both of these do not have any configuration to change <code>buildToolsVersion</code>.</p>
  <p>I did <code>sdkmanager --list_installed</code> and I hae two <em>build-tools</em> versions:</p>
  <pre><code>  build-tools;29.0.2   | 29.0.2  | Android SDK Build-Tools 29.0.2 | build-tools/29.0.2  
    build-tools;30.0.2   | 30.0.2  | Android SDK Build-Tools 30.0.2 | build-tools/30.0.2  
  </code></pre>
  <p>What should I do to fix this Warning ?</p>
  <p>Also, I am not using Android Studio. I used this guide to install Flutter without Android Studio:
  <a href="https://superflutter.blogspot.com/2021/08/how-to-install-and-configure-flutter.html" rel="noreferrer">How to Install and Configure Flutter Without Android Studio</a></p>