This reverts commit e8cf66f0a9912a34a3707976efdfbfb0bf2a4195.
Newer android sdks no longer support android apis before 14. Split the legacy support into a new project.
Adds a CoreSideLoadingActivity to sideload cores for debugging purposes. Adds instructions on how to debug both the RetroArch frontend and cores from within Android Studio Co-authored-by: natinusala <natinusala@gmail.com>