Revert "[build] Enable NuGet's Central Package Management (dotnet#1114)"

Context: dotnet/android#8279

This reverts commit 8c9eece.

Near the end of .NET 8 RC 1, the .NET 8 SDK depends on nightly packages
for .NET 6 and .NET 7:

* dotnet/runtime 7.0.11
* dotnet/runtime 6.0.22

These come from feeds such as:

    <!-- Added manually for dotnet/runtime 7.0.11 -->
    <add key="darc-pub-dotnet-runtime-a2ad4f0" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-a2ad4f03/nuget/v3/index.json" />
    <!-- Added manually for dotnet/runtime 6.0.22 -->
    <add key="darc-pub-dotnet-runtime-762f437" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/darc-pub-dotnet-runtime-762f4379/nuget/v3/index.json" />

The version number is stable, so the .NET releng team has infrastructure
to create a new feed per git commit.

Unfortunately, this makes NuGet central package management unusable for
us. 😢

As seen in dotnet/android#8279, we get errors like:

    Package source mapping matches found for package ID 'Microsoft.NETCore.App.Ref' are: 'dotnet-public'.
    ...
    external\Java.Interop\src\Java.Interop.Tools.Expressions\Java.Interop.Tools.Expressions.csproj error NU1102: Unable to find package Microsoft.NETCore.App.Ref with version (= 7.0.11)
    - Found 83 version(s) in dotnet-public [ Nearest version: 8.0.0-preview.1.23110.8 ]
    - Versions from dotnet-eng were not considered [Xamarin.Android.sln]

This is because it can only possibly resolve this package from
`dotnet-public`:

    <packageSource key="dotnet-public">
      <package pattern="*" />
    </packageSource>

Because 7.0.11 hasn't shipped yet, it is not on NuGet.org or `dotnet-public`.

For this to work, we would somehow need this added to the java.interop
repo at the time xamarin/xamarin-android gets a newer .NET 8 SDK:

    <packageSource key="darc-pub-dotnet-runtime-a2ad4f0">
      <package pattern="Microsoft.NETCore.App.Ref" />
    </packageSource>

For now, let's revert 8c9eece. Maybe there is some solution we can come
up with to use this in the future.

Directory.Build.props

@@ -9,7 +9,6 @@
     <ProduceReferenceAssemblyInOutDir>true</ProduceReferenceAssemblyInOutDir>
     <DotNetTargetFrameworkVersion>7.0</DotNetTargetFrameworkVersion>
     <DotNetTargetFramework>net$(DotNetTargetFrameworkVersion)</DotNetTargetFramework>
-    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
 
   <Import

Directory.Build.targets

@@ -3,18 +3,37 @@
 
   <!-- Add Roslyn analyzers NuGet to all projects -->
   <ItemGroup Condition=" '$(DisableRoslynAnalyzers)' != 'True' ">
-    <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers">
+    <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="3.3.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
   </ItemGroup>
 
-  <!-- Set Assets for NUnit3TestAdapter -->
+  <!-- NuGet Dependencies -->
   <ItemGroup>
-    <PackageReference Update="NUnit3TestAdapter">
+    <PackageReference Update="GitInfo"                                      Version="2.1.2" />
+    <PackageReference Update="HtmlAgilityPack"                              Version="1.11.30" />
+    <PackageReference Update="Irony"                                        Version="1.1.0" />
+    <PackageReference Update="Microsoft.Build.Framework"                    Version="17.3.2" />
+    <PackageReference Update="Microsoft.Build.Utilities.Core"               Version="17.3.2" />
+    <PackageReference Update="Microsoft.CodeAnalysis.CSharp"                Version="4.3.1" />
+    <PackageReference Update="Microsoft.CSharp"                             Version="4.7.0" />
+    <PackageReference Update="Microsoft.DotNet.GenAPI"                      Version="7.0.0-beta.22103.1" />
+    <PackageReference Update="Microsoft.NET.Test.Sdk"                       Version="17.5.0-preview-20221003-04" />
+    <PackageReference Update="Microsoft.NETFramework.ReferenceAssemblies"   Version="1.0.3" />
+    <PackageReference Update="Microsoft.SourceLink.GitHub"                  Version="1.1.1" />
+    <PackageReference Update="Microsoft.Xml.SgmlReader"                     Version="1.8.16" />
+    <PackageReference Update="Mono.CSharp"                                  Version="4.0.0.143" />
+    <PackageReference Update="Mono.Linq.Expressions"                        Version="2.0.0" />
+    <PackageReference Update="Mono.Options"                                 Version="6.12.0.148" />
+    <PackageReference Update="Mono.Terminal"                                Version="5.4.2" />
+    <PackageReference Update="nunit"                                        Version="3.13.2" />
+    <PackageReference Update="NUnit.ConsoleRunner"                          Version="3.12.0" />
+    <PackageReference Update="NUnit3TestAdapter"                            Version="4.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
+    <PackageReference Update="protobuf-net"                                 Version="2.4.4" />
   </ItemGroup>
 
   <Import Project="build-tools\scripts\VersionInfo.targets" />

NuGet.Config

@@ -11,14 +11,4 @@
     <!-- For Microsoft.DotNet.GenAPI -->
     <add key="dotnet-eng" value="https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-eng/nuget/v3/index.json" protocolVersion="3" />
   </packageSources>
-
-  <packageSourceMapping>
-    <!-- key value for <packageSource> should match key values from <packageSources> element -->
-    <packageSource key="dotnet-public">
-      <package pattern="*" />
-    </packageSource>
-    <packageSource key="dotnet-eng">
-      <package pattern="Microsoft.DotNet.GenAPI" />
-    </packageSource>
-  </packageSourceMapping>
 </configuration>

build-tools/scripts/cecil.projitems

@@ -1,7 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <_XamarinAndroidCecilVersion Condition=" '$(_XamarinAndroidCecilVersion)' == '' ">0.11.4</_XamarinAndroidCecilVersion>
+  </PropertyGroup>
   <ItemGroup Condition=" '$(_XamarinAndroidCecilPath)' == '' ">
-    <PackageReference Include="Mono.Cecil" />
+    <PackageReference Include="Mono.Cecil" Version="$(_XamarinAndroidCecilVersion)" />
   </ItemGroup>
   <ItemGroup Condition=" '$(_XamarinAndroidCecilPath)' != '' ">
     <Reference Include="$(_XamarinAndroidCecilPath)" />

tests/Java.Interop.Tools.Expressions-Tests/Java.Interop.Tools.Expressions-Tests.csproj

@@ -24,7 +24,7 @@
   <Import Project="..\..\build-tools\scripts\cecil.projitems" />
   -->
   <ItemGroup>
-    <PackageReference Include="Mono.Cecil" />
+    <PackageReference Include="Mono.Cecil" Version="0.11.4" />
     <PackageReference Include="Mono.Linq.Expressions" />
   </ItemGroup>