title: Unable to locate a development device; please run 'flutter doctor' for information about installing additional components
body: <pre><code>Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel beta, v0.9.4, on Microsoft Windows [Version 6.1.7601], locale en-US)
  [!] Android toolchain - develop for Android devices (Android SDK 28.0.3)
      X Android SDK file not found: C:\Users\Admin\AppData\Local\Android\Sdk\build-tools\28.0.3\aapt.
  [√] Android Studio (version 3.2)
  [√] Connected devices (1 available)
  
  ! Doctor found issues in 1 category.
  </code></pre>