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/android/settings.gradle.kts

@@ -21,7 +21,7 @@ plugins {
     id("dev.flutter.flutter-plugin-loader") version "1.0.0"
     id("com.android.application") version "8.11.1" apply false
     // START: FlutterFire Configuration
-    id("com.google.gms.google-services") version("4.3.10") apply false
+    id("com.google.gms.google-services") version("4.4.2") apply false
     // END: FlutterFire Configuration
     id("org.jetbrains.kotlin.android") version "2.2.20" apply false
 }