android, add release build rules which slightly help to reduce filesizes.

android/app/build.gradle.kts

@@ -15,6 +15,8 @@ android {
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
+
+
     compileOptions {
         isCoreLibraryDesugaringEnabled = true
         targetCompatibility = JavaVersion.VERSION_17
@@ -40,10 +42,30 @@ android {
     }
 
     buildTypes {
-        release {
+        getByName("release") {
             // TODO: Add your own signing config for the release build.
             // Signing with the debug keys for now, so `flutter run --release` works.
             signingConfig = signingConfigs.getByName("debug")
+
+            /// 20260928 - Without minifying.
+            /// Built build/app/outputs/flutter-apk/app-release.apk (54.3MB)
+            /// Built build/app/outputs/flutter-apk/app-armeabi-v7a-release.apk (17.2MB)
+            /// Built build/app/outputs/flutter-apk/app-arm64-v8a-release.apk (19.8MB)
+            /// Built build/app/outputs/flutter-apk/app-x86_64-release.apk (21.2MB)
+
+            isMinifyEnabled = true
+            isShrinkResources = true
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro"
+            )
+
+            /// 20260928 - With minifying, helped some, but also used
+            /// in combination with `--obfuscate --split-debug-info=./debug-info/`
+            /// Built build/app/outputs/flutter-apk/app-release.apk (54.3MB)
+            /// Built build/app/outputs/flutter-apk/app-armeabi-v7a-release.apk (16.1MB)
+            /// Built build/app/outputs/flutter-apk/app-arm64-v8a-release.apk (18.8MB)
+            /// Built build/app/outputs/flutter-apk/app-x86_64-release.apk (20.3MB)
         }
     }
 }