A small rework of the Android app

There is almost a ready-made application that implements a list of photo editing functions. It works and the algorithms are correct, but there are a number of requirements for redesigning the application. The requirements are:
1. After reviewing and analyzing the logic of the application, you will need to understand how it works and move on to the following points.
2. You need to try to reduce the amount of memory occupied by the application (you may get an unnecessary code).
3. Add changes to the app (a few new filters).