Migrate BuildConfig to Gradle Build Files

Fixes `'android.defaults.buildfeatures.buildconfig=true' is deprecated`.

Author: yawnoc

CHANGELOG.md

@@ -4,6 +4,7 @@
 ## [Unreleased]
 
 - Upgraded Android Gradle Plugin to 8.10.1
+- Migrated BuildConfig to Gradle Build Files
 
 
 ## [v1.4.2] (68) 煮者 (2025-01-12)

app/build.gradle

@@ -15,6 +15,10 @@ android
     versionName "1.4.2"
     testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
   }
+  buildFeatures
+  {
+    buildConfig true
+  }
   buildTypes
   {
     release

gradle.properties

@@ -15,6 +15,5 @@ org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
 # Android operating system, and which are packaged with your app"s APK
 # https://developer.android.com/topic/libraries/support-library/androidx-rn
 android.useAndroidX=true
-android.defaults.buildfeatures.buildconfig=true
 android.nonTransitiveRClass=false
 android.nonFinalResIds=false