Fixed bug 1740 - Android pixel format constants out of sync

wjp

In SDL HG (2.0) the pixel format constants in
android-project/src/org/libsdl/app/SDLActivity.java seem to have gone out of
sync with include/SDL_pixels.h in HG rev b1124b32b07d.

E.g., at a glance it seems like 0x85151002 should have become 0x15151002.