Unify naming for `Xamarin.GoogleAndroid.*` packages and `Xamarin.Google.Android.Play.Core.Review` namespace

[jonathanpeppers]

Follow-up to #1461, raised by @tipa in #1461 (comment).

That PR aligned ads-mobile-sdk with the repo's standard naming form (Xamarin.Google.Android.* for the NuGet ID, Google.Android.* for the namespace). A handful of sibling packages still use the older Xamarin.GoogleAndroid.* form, and Play.Core.Review still has the anomalous Xamarin. prefix in its namespace. This issue tracks unifying them.

⚠️ All of these are breaking changes for consumers — package ID renames break NuGet references and namespace changes break using statements. They should ship together in a coordinated release, with release notes calling out the rename.

Package ID renames (Xamarin.GoogleAndroid.* → Xamarin.Google.Android.*)

• Xamarin.GoogleAndroid.Annotations → Xamarin.Google.Android.Annotations (com.google.android:annotations)
• Xamarin.GoogleAndroid.Libraries.Identity.GoogleId → Xamarin.Google.Android.Libraries.Identity.GoogleId (com.google.android.libraries.identity.googleid:googleid)
• Xamarin.GoogleAndroid.Libraries.Places → Xamarin.Google.Android.Libraries.Places (com.google.android.libraries.places:places)
• Xamarin.GoogleAndroid.Libraries.Places.Compat → Xamarin.Google.Android.Libraries.Places.Compat (com.google.android.libraries.places:places-compat)
• Xamarin.GoogleAndroid.TV.Ads → Xamarin.Google.Android.TV.Ads (com.google.android.tv:tv-ads)

For each: also strip the Xamarin. prefix from the managed namespaces if present (matches the convention used by Material, Play.*, the new Ads.Mobile.Sdk, etc.), and update Additions/, Transforms/, merge.targets, etc. as needed.

Namespace cleanup (package ID unchanged)

• Xamarin.Google.Android.Play.Review — drop Xamarin. from Xamarin.Google.Android.Play.Core.Review[.Internal|.Model|.Testing] namespaces in source/com.google.android.play/review/Transforms/Metadata.Namespaces.xml
• Xamarin.Google.Android.Play.Review.Ktx — same cleanup in source/com.google.android.play/review-ktx/Transforms/Metadata.Namespaces.xml
• Audit the rest of source/com.google.android.play/*/Transforms/Metadata.Namespaces.xml for any other Xamarin.Google.Android.* namespace leftovers.

For each touched package

• Update nugetId (and any dependencies[*].artifactId that referenced the old ID) in config.json.

• Update Metadata.Namespaces.xml to drop Xamarin. from managedName.

• Regenerate / commit source/.../PublicAPI/PublicAPI.Unshipped.txt (and PublicAPI.Shipped.txt if affected) so the new namespaces are reflected.

• Update published-namespaces.txt.

• Update docs/artifact-list.md and docs/artifact-list-with-versions.md.

• Update cgmanifest.json.

• Bump nugetVersion by 0.0.0.1 (NuGet revision component) so the rename ships under a new version. Current versions for reference:

  Package	Current nugetVersion	Bumped
  Annotations	4.1.1.25	4.1.1.26
  Libraries.Identity.GoogleId	1.1.0.13	1.1.0.14
  Libraries.Places	5.2.0	5.2.0.1
  Libraries.Places.Compat	2.6.0.17	2.6.0.18
  TV.Ads	1.0.1.6	1.0.1.7
  Play.Review	2.0.2.7	2.0.2.8
  Play.Review.Ktx	2.0.2.7	2.0.2.8

  (Also update nuGetVersion in cgmanifest.json and the version column in docs/artifact-list-with-versions.md to match.)

Validation

• dotnet cake --target=binderate
• dotnet cake --target=binderate-config-verify
• dotnet cake utilities.cake -t=namespace-check
• dotnet cake --target=metadata-verify
• Full dotnet cake build green for net9.0-android and net10.0-android.