Build Production APK from Complete React Native CLI Project

All code is ready - just needs APK compilation

Description:

I have a complete React Native CLI project that needs to be compiled into a production APK for Google Play Store.

PROJECT DETAILS:
- React Native CLI (not Expo)
- Complete with android/ folder and build.gradle files
- Google Play billing integration included
- All dependencies and source code ready
- File size: 71KB compressed

REQUIREMENTS:
- Build production APK (release version)
- Must be signed for Google Play Store
- Timeline: 24-48 hours preferred

WHAT I'LL PROVIDE:
- Complete project files (mobile-app-complete.tar.gz)
- All source code and configuration

DELIVERABLE:
- Production-ready APK file for Google Play Store upload