title: Where is the value of "flutter.minSdkVersion" in Flutter project initialized?
body: <p>I have created a new Flutter project, and this is how the minSdkVersion looks like in the <code>app/build.gradle</code> file:</p>
  <pre><code>defaultConfig {
      // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
      applicationId &quot;com.example.projectname&quot;
      minSdkVersion flutter.minSdkVersion
      targetSdkVersion flutter.targetSdkVersion
      versionCode flutterVersionCode.toInteger()
      versionName flutterVersionName
  }
  </code></pre>
  <p>Where is the value of <code>flutter.minSdkVersion</code> set?</p>
  <p>Note that previously, that config value looked like the following:</p>
  <pre><code>defaultConfig {
      // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
      applicationId &quot;com.example.projectname&quot;
      minSdkVersion 19 //*** This is the part that needs to be changed, previously was 16
      targetSdkVersion 28
      versionCode 1
      versionName &quot;1.0&quot;
      testInstrumentationRunner &quot;android.support.test.runner.AndroidJUnitRunner&quot;
  }
  </code></pre>
  <p>Also, this is the content of the <code>android/local.properties</code> file:</p>
  <pre><code>sdk.dir=/Users/usernaem/Library/Android/sdk
  flutter.sdk=/Users/username/flutter
  flutter.buildMode=release
  flutter.versionName=1.0.0
  flutter.versionCode=1
  </code></pre>
  <p>As you can see, the value of <code>flutter.minSdkVersion</code> is not set there, but the project can be compiled and built successfully.</p>
  <p>Where are the <code>flutter.minSdkVersion</code> and <code>flutter.targetSdkVersion</code> variables initialized?</p>
  <p>P.S. related issue: <a href="https://github.com/flutter/flutter/issues/95533" rel="noreferrer">https://github.com/flutter/flutter/issues/95533</a></p>