title: Android Studio flutter and dart plugins not recognized by flutter doctor , but plugins are installed
body: <p>I am trying to install flutter on ubuntu , android studio flutter and dart plugins have been installed , but <code>flutter doctor</code> said that they are not installed. At the beginning flutter doctor didn't find my android studio and sdk even if they are installed, then fixed this problems by configuring custom directories for android studio and sdk with this commands : 
  <code>
  flutter config --android-studio-dir=/my/local/path/for/android/studio
  flutter config --android-sdk=/my/local/path/for/sdk
  </code> 
  but couldn't find any solution how to show android studio installed plugins directory for flutter doctor</p>
  
  <pre><code>```
  [✓] Flutter (Channel beta, v0.7.3, on Linux, locale en_US.UTF-8)
      • Flutter version 0.7.3 at /home/zayniddin/flutter
      • Framework revision 3b309bda07 (2 weeks ago), 2018-08-28 12:39:24 -0700
      • Engine revision af42b6dc95
      • Dart version 2.1.0-dev.1.0.flutter-ccb16f7282
  
  [✓] Android toolchain - develop for Android devices (Android SDK 28.0.2)
      • Android SDK at /home/zayniddin/Documents/Sdk
      • Android NDK location not configured (optional; useful for native profiling support)
      • Platform android-28, build-tools 28.0.2
      • Java binary at: /home/zayniddin/Documents/android-studio/jre/bin/java
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
      • All Android licenses accepted.
  
  [✓] Android Studio
      • Android Studio at /home/zayniddin/Documents/android-studio
      ✗ Flutter plugin not installed; this adds Flutter specific functionality.
      ✗ Dart plugin not installed; this adds Dart specific functionality.
      • android-studio-dir = /home/zayniddin/Documents/android-studio
      • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1024-b01)
  
  [✓] IntelliJ IDEA Community Edition (version 2018.2)
      • IntelliJ at /snap/intellij-idea-community/77
      • Flutter plugin version 28.0.4
      • Dart plugin version 182.4323.44
  
  [✓] VS Code (version 1.27.1)
      • VS Code at /usr/share/code
      • Flutter extension version 2.18.0
  
  [!] Connected devices
      ! No devices available
  
  ! Doctor found issues in 1 category.
  
  ```
  </code></pre>
  
  <p>any solutions ?, please help me </p>