[google_sign_in] Add Android account name field as optional (platform interface changes) (#8735)

This PR contains the platform interface changes for the main PR [8573](#8573). As a whole, these changes add a new option to explicitly specify the account name on Android while signing in within the google_sign_in package.

Flutter issue: [163257](flutter/flutter#163257)

Author: neilself

packages/google_sign_in/google_sign_in_platform_interface/CHANGELOG.md

@@ -1,5 +1,7 @@
-## NEXT
+## 2.5.0
 
+* Adds a sign-in field to allow Android clients to explicitly specify an account name.
+  This capability is only available within Android for the underlying libraries.
 * Updates minimum supported SDK version to Flutter 3.22/Dart 3.4.
 
 ## 2.4.5

packages/google_sign_in/google_sign_in_platform_interface/lib/src/types.dart

@@ -36,6 +36,7 @@ class SignInInitParameters {
     this.clientId,
     this.serverClientId,
     this.forceCodeForRefreshToken = false,
+    this.forceAccountName,
   });
 
   /// The list of OAuth scope codes to request when signing in.
@@ -78,6 +79,11 @@ class SignInInitParameters {
   ///
   /// This is only used on Android.
   final bool forceCodeForRefreshToken;
+
+  /// Can be used to explicitly set an account name on the underlying platform sign-in API.
+  ///
+  /// This should only be set on Android; other platforms may throw.
+  final String? forceAccountName;
 }
 
 /// Holds information about the signed in user.

packages/google_sign_in/google_sign_in_platform_interface/pubspec.yaml

@@ -4,7 +4,7 @@ repository: https://github.com/flutter/packages/tree/main/packages/google_sign_i
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+google_sign_in%22
 # NOTE: We strongly prefer non-breaking changes, even at the expense of a
 # less-clean API. See https://flutter.dev/go/platform-interface-breaking-changes
-version: 2.4.5
+version: 2.5.0
 
 environment:
   sdk: ^3.4.0