Android: Use input override system for touch controls

This is the first step of getting rid of the controller indirection
on Android. (Needing a way for touch controls to provide input
to the emulator core is the reason why the controller indirection
exists to begin with as far as I understand it.)

Source/Android/jni/CMakeLists.txt

@@ -10,6 +10,7 @@ add_library(main SHARED
   GameList/GameFile.cpp
   GameList/GameFile.h
   GameList/GameFileCache.cpp
+  Input/InputOverrider.cpp
   IniFile.cpp
   MainAndroid.cpp
   RiivolutionPatches.cpp