title: "flutter run" gets stuck at "Running Gradle task 'assembleDebug"
body: <p>I updated Flutter to the latest stable version today - <code>1.12.13+hotfix.7</code> (I was running 1.12.13+hotfix.6 before). When I tried to run my project in vs code with <code>flutter run</code> it always gets stuck at <code>Running Gradle task 'assembleDebug</code>: </p>
  
  <p><a href="https://i.stack.imgur.com/9XeR9.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/9XeR9.png" alt="enter image description here"></a></p>
  
  <p>Have anyone experienced the same issue?</p>
  
  <p>Here is the output of <code>flutter doctor -v</code>:</p>
  
  <pre><code>[georgi@georgi-pc Line-up-Generator]$ flutter doctor -v
  [✓] Flutter (Channel stable, v1.12.13+hotfix.7, on Linux, locale en_GB.UTF-8)
      • Flutter version 1.12.13+hotfix.7 at /home/georgi/Development/flutter
      • Framework revision 9f5ff2306b (2 weeks ago), 2020-01-26 22:38:26 -0800
      • Engine revision a67792536c
      • Dart version 2.7.0
  
  [!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
      • Android SDK at /home/georgi/Android/Sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-29, build-tools 29.0.2
      • Java binary at: /opt/android-studio/jre/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
      ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
  
  [!] Android Studio (version 3.5)
      • Android Studio at /opt/android-studio
      ✗ Flutter plugin not installed; this adds Flutter specific functionality.
      ✗ Dart plugin not installed; this adds Dart specific functionality.
      • Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
  
  [✓] Connected device (1 available)
      • MI 8 • 62fb6fd8 • android-arm64 • Android 10 (API 29)
  
  ! Doctor found issues in 2 categories.
  
  </code></pre>
  
  <p>I have to point out that I have tried running <code>flutter doctor --android-licenses</code> but it gets stuck at 25% </p>
  
  <p><a href="https://i.stack.imgur.com/0dFFV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/0dFFV.png" alt="enter image description here"></a></p>
  
  <p>Note: I am on Manjaro 18.1.5</p>
  
  <p><strong>UPDATE</strong>:
  There seems to be an issue with Dart SDK: <a href="https://github.com/flutter/flutter/issues/49185#issuecomment-589968058" rel="nofollow noreferrer">https://github.com/flutter/flutter/issues/49185#issuecomment-589968058</a></p>