[Xamarin.Android.Build.Tasks] make designer MSBuild targets a no-op (#9473)

Context: https://developercommunity.visualstudio.com/t/XamarinAndroid-Designer---Replacement/10728132

As the Android designer is no longer supported in Visual Studio, we
can remove the MSBuild logic for the following targets:

* `GetExtraLibraryLocationsForDesigner`

* `SetupDependenciesForDesigner`

Since these are public MSBuild target names, we should probably leave
them in and "do nothing".

This also will simplify things if we ever refactor
`<GenerateJavaStubs/>` and friends as this removes a caller.

I also removed the `DesignerTests.cs` file that was testing these.

Author: jonathanpeppers

src/Xamarin.Android.Build.Tasks/MSBuild/Xamarin/Android/Xamarin.Android.Designer.targets

@@ -16,146 +16,8 @@ Copyright (C) 2016 Xamarin. All rights reserved.
 
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 
-<Target Name="GetExtraLibraryLocationsForDesigner"
-    DependsOnTargets="_SetupDesignTimeBuildForCompile"
-    Returns="ExtraJarLocation;ExtraResourceLocation">
-  <ReadLibraryProjectImportsCache
-      Condition="Exists('$(_AndroidLibraryProjectImportsCache)')"
-      CacheFile="$(_AndroidLibraryProjectImportsCache)">
-    <Output TaskParameter="ResolvedResourceDirectories" ItemName="_LibraryResourceDirectories" />
-    <Output TaskParameter="Jars" ItemName="_LibraryJars" />
-  </ReadLibraryProjectImportsCache>
-  <ItemGroup>
-    <ExtraJarLocation Include="@(_LibraryJars)">
-      <Source>LibraryImport</Source>
-    </ExtraJarLocation>
-    <ExtraJarLocation Include="@(AndroidJavaLibrary->'%(FullPath)')">
-      <Source>AndroidJavaLibrary</Source>
-    </ExtraJarLocation>
-    <ExtraResourceLocation Include="@(_LibraryResourceDirectories)">
-      <Source>LibraryImport</Source>
-    </ExtraResourceLocation>
-  </ItemGroup>
-</Target>
-
-<Target Name="_CopyAssembliesForDesigner"
-    Inputs="@(ResolvedAssemblies)"
-    Outputs="@(ResolvedAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(Filename)%(Extension)')">
-  <Copy
-      SourceFiles="@(ResolvedAssemblies)"
-      DestinationFiles="@(ResolvedAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(Filename)%(Extension)')"
-  />
-</Target>
-
-<Target Name="_PrepareAssembliesForDesigner">
-  <ItemGroup>
-    <_ResolvedAssemblies
-        Include="@(ResolvedAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(Filename)%(Extension)')"
-    />
-    <_ResolvedUserAssemblies
-        Include="@(ResolvedUserAssemblies->'$(MonoAndroidIntermediateAssemblyDir)%(Filename)%(Extension)')"
-    />
-    <_ResolvedUserMonoAndroidAssembliesForDesigner
-        Include="@(_ResolvedUserAssemblies)"
-        Condition="'%(_ResolvedUserAssemblies.TargetFrameworkIdentifier)' == 'MonoAndroid' Or '%(_ResolvedUserAssemblies.HasMonoAndroidReference)' == 'True'"
-    />
-  </ItemGroup>
-</Target>
-
-<Target Name="_GeneratePackageManagerJavaForDesigner"
-    DependsOnTargets="_AddStaticResources;_ResolveAssemblies;_CopyAssembliesForDesigner;_PrepareAssembliesForDesigner;$(BeforeGenerateAndroidManifest)"
-    Inputs="$(_ResolvedUserAssembliesHashFile);@(ResolvedAssemblies);@(ResolvedUserAssemblies);$(_AndroidManifestAbs);"
-    Outputs="$(_AndroidIntermediateJavaSourceDirectory)mono\MonoPackageManager_Resources.java;$(_AcwMapFile)">
-
-  <PropertyGroup>
-    <_ManifestOutput Condition=" '$(AndroidManifestMerger)' == 'legacy' ">$(IntermediateOutputPath)android\AndroidManifest.xml</_ManifestOutput>
-    <_ManifestOutput Condition=" '$(AndroidManifestMerger)' != 'legacy' ">$(IntermediateOutputPath)AndroidManifest.xml</_ManifestOutput>
-  </PropertyGroup>
-  <ItemGroup>
-    <_MergedManifestDocuments Condition=" '$(AndroidManifestMerger)' == 'legacy' " Include="@(ExtractedManifestDocuments)" />
-  </ItemGroup>
-
-  <GenerateJavaStubs
-      ResolvedAssemblies="@(_ResolvedAssemblies)"
-      ResolvedUserAssemblies="@(_ResolvedUserMonoAndroidAssembliesForDesigner)"
-      ManifestTemplate="$(_AndroidManifestAbs)"
-      MergedManifestDocuments="@(_MergedManifestDocuments)"
-      Debug="$(AndroidIncludeDebugSymbols)"
-      NeedsInternet="$(AndroidNeedsInternetPermission)"
-      AndroidSdkPlatform="$(_AndroidApiLevel)"
-      AndroidSdkDir="$(_AndroidSdkDirectory)"
-      PackageName="$(_AndroidPackage)"
-      VersionName="$(_AndroidVersionName)"
-      VersionCode="$(_AndroidVersionCode)"
-      ApplicationLabel="$(_ApplicationLabel)"
-      OutputDirectory="$(IntermediateOutputPath)android"
-      TypemapOutputDirectory="$(_NativeAssemblySourceDir)"
-      GenerateNativeAssembly="false"
-      MergedAndroidManifestOutput="$(_ManifestOutput)"
-      EmbedAssemblies="$(EmbedAssembliesIntoApk)"
-      BundledWearApplicationName="$(BundledWearApplicationPackageName)"
-      PackageNamingPolicy="$(AndroidPackageNamingPolicy)"
-      ApplicationJavaClass="$(AndroidApplicationJavaClass)"
-      FrameworkDirectories="$(_XATargetFrameworkDirectories);$(_XATargetFrameworkDirectories)Facades"
-      AcwMapFile="$(_AcwMapFile)"
-      SupportedAbis="$(_BuildTargetAbis)"
-      SupportedOSPlatformVersion="$(SupportedOSPlatformVersion)">
-  </GenerateJavaStubs>
-  <ManifestMerger
-      Condition=" '$(AndroidManifestMerger)' == 'manifestmerger.jar' "
-      ToolPath="$(JavaToolPath)"
-      JavaOptions="$(JavaOptions)"
-      ManifestMergerJarPath="$(AndroidManifestMergerJarPath)"
-      AndroidManifest="$(IntermediateOutputPath)AndroidManifest.xml"
-      OutputManifestFile="$(IntermediateOutputPath)android\AndroidManifest.xml"
-      LibraryManifestFiles="@(ExtractedManifestDocuments)"
-      ManifestPlaceholders="$(AndroidManifestPlaceholders)"
-  />
-  <ConvertCustomView
-      Condition="Exists('$(_CustomViewMapFile)')"
-      CustomViewMapFile="$(_CustomViewMapFile)"
-      AcwMapFile="$(_AcwMapFile)"
-      ResourceDirectories="$(MonoAndroidResDirIntermediate);@(LibraryResourceDirectories)"
-  />
-  <!-- Create java needed for Mono runtime -->
-  <GeneratePackageManagerJava
-      ResolvedAssemblies="@(_ResolvedAssemblies)"
-      ResolvedUserAssemblies="@(_ResolvedUserAssemblies)"
-      MainAssembly="$(MonoAndroidLinkerInputDir)$(TargetFileName)"
-      OutputDirectory="$(_AndroidIntermediateJavaSourceDirectory)mono"
-      EnvironmentOutputDirectory="$(_AndroidIntermediateJavaSourceDirectory)mono\android\app"
-      TargetFrameworkVersion="$(TargetFrameworkVersion)"
-      Manifest="$(IntermediateOutputPath)android\AndroidManifest.xml"
-      Environments="@(AndroidEnvironment);@(LibraryEnvironments)"
-      AndroidAotMode="$(AndroidAotMode)"
-      EnableLLVM="$(EnableLLVM)"
-      HttpClientHandlerType="$(AndroidHttpClientHandlerType)"
-      TlsProvider="$(AndroidTlsProvider)"
-      Debug="$(AndroidIncludeDebugSymbols)"
-      AndroidSequencePointsMode="$(_SequencePointsMode)"
-      EnableSGenConcurrent="$(AndroidEnableSGenConcurrent)"
-      SupportedAbis="$(_BuildTargetAbis)"
-      AndroidPackageName="$(_AndroidPackage)"
-      EnablePreloadAssembliesDefault="$(_AndroidEnablePreloadAssembliesDefault)">
-  </GeneratePackageManagerJava>
-</Target>
-
-<Target Name="SetupDependenciesForDesigner"
-    DependsOnTargets="_ResolveMonoAndroidSdks;UpdateAndroidResources;_AdjustJavacVersionArguments;_GeneratePackageManagerJavaForDesigner;_GetMonoPlatformJarPath;_DetermineJavaLibrariesToCompile"
-    Inputs="@(_AndroidMSBuildAllProjects);$(MonoPlatformJarPath);@(_JavaStubFiles);@(AndroidJavaSource)"
-    Outputs="$(_AndroidStampDirectory)SetupDependenciesForDesigner.stamp">
-  <Javac
-      JavaPlatformJarPath="$(JavaPlatformJarPath)"
-      ClassesOutputDirectory="$(_AndroidIntermediateJavaClassDirectory)"
-      StubSourceDirectory="$(_AndroidIntermediateJavaSourceDirectory)"
-      JavaSourceFiles=""
-      ToolPath="$(JavacToolPath)"
-      ToolExe="$(JavacToolExe)"
-      Jars="@(_JavaLibrariesToCompile);@(_ReferenceJavaLibs)"
-      JavacTargetVersion="$(JavacTargetVersion)"
-      JavacSourceVersion="$(JavacSourceVersion)"
-  />
-  <Touch Files="$(_AndroidStampDirectory)SetupDependenciesForDesigner.stamp" AlwaysCreate="true" />
-</Target>
+<!-- Public targets for the designer are deprecated -->
+<Target Name="GetExtraLibraryLocationsForDesigner" />
+<Target Name="SetupDependenciesForDesigner" />
 
 </Project>