removing debugging symbols and debugging code from Android app (Ionic)?

Iam testing an ionic mobile app (Android version), and iam supposed to test : 1-The app catches and handles possible exceptions. 2-In unmanaged code, memory is allocated, freed and used securely. 3-Debugging code has been removed, and the app does not log verbose errors or debugging messages. 4-Debugging symbols have been removed from native binaries.

How could i do that ?