build(android): update app configuration and naming

- Update namespace in build.gradle.kts
- Update applicationId in build.gradle.kts
- Update project_info in google-services.json
- Update package name in AndroidManifest.xml
- Update package name in MainActivity.kt
- Adjust dynamic link domain in AndroidManifest.xml

Author: fulleni

android/app/build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 }
 
 android {
-    namespace = "com.example.ht_main"
+    namespace = "com.example.flutter_news_app_mobile_client_full_source_code"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = "29.0.13113456"
 
@@ -24,7 +24,7 @@ android {
 
     defaultConfig {
         // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.example.ht_main"
+        applicationId = "com.example.flutter_news_app_mobile_client_full_source_code"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = 24

android/app/google-services.json

@@ -1,15 +1,15 @@
 {
   "project_info": {
     "project_number": "420644261437",
-    "project_id": "headlines-toolkit",
-    "storage_bucket": "headlines-toolkit.firebasestorage.app"
+    "project_id": "flutter-news-app-full-source-code",
+    "storage_bucket": "flutter-news-app-full-source-code.firebasestorage.app"
   },
   "client": [
     {
       "client_info": {
         "mobilesdk_app_id": "1:420644261437:android:3fa3052f883bf86958a454",
         "android_client_info": {
-          "package_name": "com.example.ht_main"
+          "package_name": "com.example.flutter_news_app_mobile_client_full_source_code"
         }
       },
       "oauth_client": [],

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <application
-        android:label="ht_main"
+        android:label="flutter_news_app_mobile_client_full_source_code"
         android:name="${applicationName}"
         android:icon="@mipmap/launcher_icon">
         <activity
@@ -30,7 +30,7 @@
                 <category android:name="android.intent.category.DEFAULT"/>
                 <category android:name="android.intent.category.BROWSABLE"/>
                 <!-- Accepts URIs that begin with your dynamic link domain -->
-                <data android:scheme="https" android:host="htmain.page.link" />
+                <data android:scheme="https" android:host="flutter-news-app-full-source-code.page.link" />
             </intent-filter>
         </activity>
         <!-- Don't delete the meta-data below.

android/app/src/main/kotlin/com/example/ht_main/MainActivity.kt

@@ -1,4 +1,4 @@
-package com.example.ht_main
+package com.example.flutter_news_app_mobile_client_full_source_code
 
 import io.flutter.embedding.android.FlutterActivity