Bump to xamarin/xamarin-android-tools/main@f4c44e2ac (#963)

Context: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1397171
Context: https://devdiv.visualstudio.com/DevDiv/_workitems/edit/1433453

Changes: http://github.com/xamarin/xamarin-android-tools/compare/34e98e2b65917d105169f868b5648f67e68b6784...f4c44e2ac2d91396226f31e8c200464ecc65f648

  * dotnet/android-tools@f4c44e2: [Xamarin.Android.Tools.AndroidSdk] Attributes can be null! (#158)
  * dotnet/android-tools@f0b3abd: Revert "[Xamarin.Android.Tools.AndroidSdk] Update SDK component for API-32 (#156)"
  * dotnet/android-tools@bbe85df: [Xamarin.Android.Tools.AndroidSdk] Update SDK component for API-32 (#156)
  * dotnet/android-tools@a7f4d30: [ci] Mention new NuGet feed and release (#153)
  * dotnet/android-tools@85ae77f: Merge pull request #152 from xamarin/dev/mattnorflus/SigningMigration
  * dotnet/android-tools@dd34e54: Adding condition to GetFilesToSign to only include files if build configuration is Release
  * dotnet/android-tools@0e80ea1: Bump LibZipSharp to 2.0.3 (#151)
  * dotnet/android-tools@d0ab6ac: Fix Typo in commit 0dcf7172 (#150)
  * dotnet/android-tools@0dcf717: Bump LibZipSharp to 2.0.2 (#149)
  * dotnet/android-tools@db125a7: [build] Add d17-* as a branch trigger
  * dotnet/android-tools@f2cbc6a: Add resource dlls to MicroBuild signing. (#145)
  * dotnet/android-tools@35c89dd: Update MaximumCompatibleNDKMajorVersion to be 23 (#144)
  * dotnet/android-tools@0a22957: [Xamarin.Android.Tools.AndroidSdk] Parse Properties after header (#143)
  * dotnet/android-tools@dac3a47: [Xamarin.Android.Tools.AndroidSdk] Add API-31 to KnownVersions (#141)
  * dotnet/android-tools@fc976d8: [Xamarin.Android.Tools.AndroidSdk] Add JdkInfo.GetSupportedJdkInfos() (#142)

Author: jonpryor