Bump to dotnet/android-tools@3debf8e0 (#1236)

Changes: dotnet/android-tools@137ad81...3debf8e

  * dotnet/android-tools@3debf8e: [BaseTasks] Import Xamarin.Build.AsyncTask (#237)
  * dotnet/android-tools@9674590: Update pipeline and pipeline info in README.md (#239)
  * dotnet/android-tools@1c09dcc: Update README.md and build scripts (#238)
  * dotnet/android-tools@2606225: Bump to dotnet/msbuild@33de0b22 (#232)
  * dotnet/android-tools@555d509: Bump LibZipSharp and Xamarin.Build.AsyncTask (#236)
  * dotnet/android-tools@da2c33e: Force loc task pool image to windows (#234)

Author: jonpryor