Update Azure pipelines script

Author: Hans-Gunnar Vold

azure-pipelines.yml

@@ -13,15 +13,8 @@ variables:
   buildConfiguration: 'Release'
   outputDirectory: '$(build.binariesDirectory)/$(buildConfiguration)'
 
-steps:
-- task: NuGetToolInstaller@0
-
-- task: NuGetCommand@2
-  inputs:
-    restoreSolution: '**/*.sln'
-
-- task: XamarinAndroid@1
+- task: DotNetCoreCLI@2
   inputs:
-    projectFile: '**/*droid*.csproj'
-    outputDirectory: '$(outputDirectory)'
-    configuration: '$(buildConfiguration)'
+    command: 'build'
+    projects: '**/*droid*.csproj'
+    arguments: '--configuration $(buildConfiguration) --output $(outputDirectory)'