title: Flutter release apk crash on launch
body: <p>I am having an issue testing a release build on my device. If I use the app using <code>flutter run</code> or <code>flutter run --release</code>, the app runs with no errors reported and I can use the app without issue. However, using the generated APK from <code>flutter build apk</code>, the app crashes immediately stating the app failed to launch.</p>
  <p>I have followed everything from here <a href="https://flutter.dev/docs/deployment/android#building-the-app-for-release" rel="nofollow noreferrer">https://flutter.dev/docs/deployment/android#building-the-app-for-release</a> so that shouldn't be the issue.</p>
  <p>How do I begin to debug this issue?</p>
  <p>This is the output from Flutter Doctor -v</p>
  <pre><code>[✓] Flutter (Channel stable, 1.20.4, on Mac OS X 10.15.7 19H2, locale en-GB)
      • Flutter version 1.20.4 at /Users/student/flutter
      • Framework revision fba99f6cf9 (3 weeks ago), 2020-09-14 15:32:52 -0700
      • Engine revision d1bc06f032
      • Dart version 2.9.2
  
   
  [✓] Android toolchain - develop for Android devices (Android SDK version 29.0.3)
      • Android SDK at /Users/student/Library/Android/sdk
      • Platform android-29, build-tools 29.0.3
      • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
      • All Android licenses accepted.
  
  [✓] Xcode - develop for iOS and macOS (Xcode 12.0.1)
      • Xcode at /Applications/Xcode.app/Contents/Developer
      • Xcode 12.0.1, Build version 12A7300
      • CocoaPods version 1.9.1
  
  [✓] Android Studio (version 4.0)
      • Android Studio at /Applications/Android Studio.app/Contents
      • Flutter plugin version 49.0.2
      • Dart plugin version 193.7547
      • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b3-6222593)
  
  [✓] VS Code (version 1.49.3)
      • VS Code at /Applications/Visual Studio Code.app/Contents
      • Flutter extension version 3.15.0
  </code></pre>