chore: add build configuration for example app

Author: Burak

example/android/app/proguard-rules.pro

@@ -7,4 +7,8 @@
 # For more details, see
 #   http://developer.android.com/guide/developing/tools/proguard.html
 
+-keep class com.facebook.hermes.unicode.** { *; }
+-keep class com.facebook.jni.** { *; }
+-keep class com.facebook.react.turbomodule.** { *; }
+
 # Add any project specific keep options here:

example/package.json

@@ -5,6 +5,7 @@
   "private": true,
   "scripts": {
     "android": "react-native run-android",
+    "android - testRelease": "cd android && ./gradlew clean && cd .. && react-native run-android --variant=release",
     "ios": "react-native run-ios",
     "start": "react-native start"
   },