title: when I start to run flutter doctor it say X Android SDK file not found: adb. how I solve this problem
body: <pre><code>C:\Users\ASUS&gt;flutter doctor
  Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel stable, 2.5.3, on Microsoft Windows [Version 10.0.19042.1526], locale en-US)
  [!] Android toolchain - develop for Android devices (Android SDK version 32.1.0-rc1)
      X Android SDK file not found: adb.
  [√] Chrome - develop for the web
  [√] Android Studio (version 2021.1) ` `
  [√] VS Code (version 1.64.2)
  [√] Connected device (2 available)
  
  ! Doctor found issues in 1 category.
  </code></pre>