Hardening changes the APK and the delivered artifact is unsigned. The application owner must sign it and validate installation, upgrade, startup, authentication, networking, payments, push, background work, and native behavior on target devices and channels.
Detection rules, Android versions, SDKs, and application code evolve. A plan supplies usage capacity; it does not guarantee identical results for every future release, device, store, or security product. Validate a small candidate first, then scale a stable process.