[google_sign_in] Suppress `deprecation` warnings (#5049)

diff --git a/packages/google_sign_in/google_sign_in_android/CHANGELOG.md b/packages/google_sign_in/google_sign_in_android/CHANGELOG.md
index 90069d0..67fb08f 100644
--- a/packages/google_sign_in/google_sign_in_android/CHANGELOG.md
+++ b/packages/google_sign_in/google_sign_in_android/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 5.2.8
+
+* Suppresses `deprecation` warnings (for using Android V1 embedding).
+
 ## 5.2.7
 
 * Fixes library_private_types_in_public_api, sort_child_properties_last and use_key_in_widget_constructors
diff --git a/packages/google_sign_in/google_sign_in_android/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java b/packages/google_sign_in/google_sign_in_android/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
index a1237f0..9bee8fa 100644
--- a/packages/google_sign_in/google_sign_in_android/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
+++ b/packages/google_sign_in/google_sign_in_android/android/src/main/java/io/flutter/plugins/googlesignin/GoogleSignInPlugin.java
@@ -76,6 +76,7 @@
   }
 
   @VisibleForTesting
+  @SuppressWarnings("deprecation")
   public void setUpRegistrar(PluginRegistry.Registrar registrar) {
     delegate.setUpRegistrar(registrar);
   }
@@ -267,6 +268,7 @@
 
     private final Context context;
     // Only set registrar for v1 embedder.
+    @SuppressWarnings("deprecation")
     private PluginRegistry.Registrar registrar;
     // Only set activity for v2 embedder. Always access activity from getActivity() method.
     private Activity activity;
@@ -282,6 +284,7 @@
       this.googleSignInWrapper = googleSignInWrapper;
     }
 
+    @SuppressWarnings("deprecation")
     public void setUpRegistrar(PluginRegistry.Registrar registrar) {
       this.registrar = registrar;
       registrar.addActivityResultListener(this);
diff --git a/packages/google_sign_in/google_sign_in_android/pubspec.yaml b/packages/google_sign_in/google_sign_in_android/pubspec.yaml
index d9b2723..c4c30cd 100644
--- a/packages/google_sign_in/google_sign_in_android/pubspec.yaml
+++ b/packages/google_sign_in/google_sign_in_android/pubspec.yaml
@@ -2,7 +2,7 @@
 description: Android implementation of the google_sign_in plugin.
 repository: https://github.com/flutter/plugins/tree/main/packages/google_sign_in/google_sign_in_android
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
-version: 5.2.7
+version: 5.2.8
 
 environment:
   sdk: ">=2.14.0 <3.0.0"