Custom WhatsApp Message Editing Feature

I'm looking for a developer with expertise in modifying Android applications, specifically WhatsApp. The task is to implement a message editing feature that allows messages to be edited up to 12 hours after being sent. Additionally, edited messages should not display as 'edited' in the chat window.

Key Requirements:
- Modification of WhatsApp for Android
- Allowing message editing in both individual and group chats
- Integration of this feature into another app

Ideal Skills:
- Proficient in Android application development
- Experience with app modification and customization
- Knowledge of WhatsApp's architecture

Please confirm if you can accomplish this task or if you have the necessary expertise to do so.