add example app apk

Author: thang2162

example/android/app/build.gradle

@@ -93,6 +93,12 @@ android {
             keyAlias 'androiddebugkey'
             keyPassword 'android'
         }
+        release {
+            storeFile file(MYAPP_UPLOAD_STORE_FILE)
+            storePassword MYAPP_UPLOAD_STORE_PASSWORD
+            keyAlias MYAPP_UPLOAD_KEY_ALIAS
+            keyPassword MYAPP_UPLOAD_KEY_PASSWORD
+        }
     }
     buildTypes {
         debug {
@@ -101,7 +107,7 @@ android {
         release {
             // Caution! In production, you need to generate your own keystore file.
             // see https://reactnative.dev/docs/signed-apk-android.
-            signingConfig signingConfigs.debug
+            signingConfig signingConfigs.release
             minifyEnabled enableProguardInReleaseBuilds
             proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
         }

example/android/app/my-upload-key.keystore

@@ -42,3 +42,8 @@ hermesEnabled=true
 # This allows your app to draw behind system bars for an immersive UI.
 # Note: Only works with ReactActivity and should not be used with custom Activity.
 edgeToEdgeEnabled=false
+
+MYAPP_UPLOAD_STORE_FILE=my-upload-key.keystore
+MYAPP_UPLOAD_KEY_ALIAS=my-key-alias
+MYAPP_UPLOAD_STORE_PASSWORD=password
+MYAPP_UPLOAD_KEY_PASSWORD=password