build, clean up the release APK setup.

android/app/build.gradle.kts

@@ -41,10 +41,6 @@ android {
 
     buildTypes {
         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)
@@ -56,12 +52,7 @@ android {
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro",
-                "flutter_proguard_rules.pro"
             )
-            ndk {
-                //noinspection ChromeOsAbiSupport
-                abiFilters += listOf("arm64-v8a")
-            }
 
             /// 20260928 - With minifying, helped some, but also used
             /// in combination with `--obfuscate --split-debug-info=./debug-info/`
@@ -69,6 +60,11 @@ android {
             /// 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)
+
+            ndk {
+                //noinspection ChromeOsAbiSupport
+                abiFilters += listOf("arm64-v8a")
+            }
         }
     }
 }