Allow 'xbd' package types to use <AndroidNamespaceReplacement>. (#1020

)

I don't remember why I thought these needed to be disabled.  Allow 'xbd' package types to use `<AndroidNamespaceReplacement>`.

Note that `metadata` specified package names take precedence over `<AndroidNamespaceReplacement>` names, so GPS packages still work unchanged.

Additionally, by coexisting, this would allow us to slowly migrate GPS to `<AndroidNamespaceReplacement>` in the future if desired instead of needing to migrate all 1000+ `metadata` names in one big PR.

source/_PackageLevelCustomizations.cshtml

@@ -55,14 +55,3 @@
     <EmbeddedJar Include="..\..\externals\com.xamarin.google.android.play.feature.delivery.extensions\extensions.jar" />
   </ItemGroup>
 }
-
-@if (Model.Type == AndroidBinderator.BindingType.XamarinBuildDownload
-     && Model.NuGetPackageId != "Xamarin.Google.Android.InstallReferrer"
-     && Model.NuGetPackageId != "Xamarin.Google.UserMessagingPlatform"
-     && Model.NuGetPackageId != "Xamarin.Google.Assistant.AppActions.Widgets"
-     ) {
-  <ItemGroup>
-    <!-- GPS doesn't currently use <AndroidNamespaceReplacement> -->
-    <AndroidNamespaceReplacement Remove="@@(AndroidNamespaceReplacement)" />
-  </ItemGroup>
-}