title: I want to run flutter on windows 7 with my android phone as a emulator . truned on my debugging mode. How can i fix issue of flutter doctor command
body: <p>$ flutter doctor
  Doctor summary (to see all details, run flutter doctor -v):</p>
  
  <p>[√] Flutter (Channel stable, v1.5.4-hotfix.2, on Microsoft Windows [Version 6.1.7601], locale en-US)</p>
  
  <p>[!] Android toolchain - develop for Android devices (Android SDK version 29.0.0)
      X Android license status unknown.
        Try re-installing or updating your Android SDK Manager.
        See <a href="https://developer.android.com/studio/#downloads" rel="nofollow noreferrer">https://developer.android.com/studio/#downloads</a> or visit <a href="https://flutter.dev/setup/#android-setup" rel="nofollow noreferrer">https://flutter.dev/setup/#android-setup</a> for detailed instructions.</p>
  
  <p>[!] Android Studio (version 3.4)
      X Flutter plugin not installed; this adds Flutter specific functionality.
      X Dart plugin not installed; this adds Dart specific functionality.</p>
  
  <p>[√] VS Code (version 1.35.1)
  !] Connected device
      ! No devices available</p>
  
  <p>! Doctor found issues in 3 categories.</p>