fix(client/android): enable Firebase Analytics upload on AGP 8

google-services plugin 4.3.10 is incompatible with AGP 8.x: it generated
google_app_id into a values.xml but never merged it into the APK, so native
Firebase reported "Missing google_app_id. Firebase Analytics disabled" and
uploaded nothing (FCM still worked via the Dart-side init, masking it).

- bump com.google.gms.google-services 4.3.10 -> 4.4.2
- correct firebase_options.dart android appId from the stale
  com.halobestie.client.client_app registration to the com.mybestie app id
  (1:1068156046511:android:4f8fe9a3c7c14c57b8185a) so the Dart [DEFAULT]
  app matches google-services.json

Verified: google_app_id now merges into R.txt and logcat FA shows
"App measurement enabled ... Uploading data".

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

client_app/lib/firebase_options.dart

@@ -51,7 +51,7 @@ class DefaultFirebaseOptions {
 
   static const FirebaseOptions android = FirebaseOptions(
     apiKey: 'AIzaSyDFWlLSWytqwI7LSdUbVrO7J5De9L2LV2U',
-    appId: '1:1068156046511:android:ba6e699216de1c50b8185a',
+    appId: '1:1068156046511:android:4f8fe9a3c7c14c57b8185a',
     messagingSenderId: '1068156046511',
     projectId: 'halobestie-clone-dev',
     storageBucket: 'halobestie-clone-dev.firebasestorage.app',