[NAOT][android] Microsoft.Extensions.Hosting.Unit.Tests failure

[sbomer]

The following two Microsoft.Extensions.Hosting.Unit.Tests fail on x64 android with native AOT:

• RelativeContentRootIsResolved:
  System.IO.DirectoryNotFoundException : /system/bin/testroot/
• CanConfigureAppConfigurationFromFile:
  System.IO.FileNotFoundException : The configuration file 'appSettings.json' was not found and is not optional. The expected physical path was '/system/bin/appSettings.json'.
• CreateDefaultBuilder_IncludesCommandLineArguments:
  System.NullReferenceException : Object reference not set to an instance of an object.
  Microsoft.Extensions.Hosting.Tests.HostTests.CreateDefaultBuilder_IncludesCommandLineArguments()

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