Both surfaceflinger and HWC implementations have been defining these
themselves, making future changes more difficult. Better to define
them centrally, where they can be updated easily.
Change-Id: I793158b858c84b2470b05f9ea77cc5a0c7e247f1
Add cnativewindow which provides a minimal bridge between EGL and hwcomposer or fbhal.
Add test-arrows, a trivial GLES2 test program to exercise this.
Change-Id: I60ece4378def6b6eda55437c215fc46a180ad7a3