Improve touch input in-game

android/app/app.iml

src/d_event.h

src/d_main.c

src/djgppdos/i_system.c

src/dummy/i_system.c

src/g_input.c

src/g_input.h

src/i_system.h

src/sdl/i_system.c

src/sdl/i_video.c

src/win32/win_sys.c