Remove eglEnums.hpp includes from framework headers

Remove eglEnums.hpp includes from framework headers

Platform ports may need to include egl(ext).h, and that will confilict
with defines in eglwEnums.hpp. This change removes eglwEnums.hpp
references from EGL framework headers to allow including actual EGL
headers if necessary.

Change-Id: I4aaa0d40196a7cd041a5a36828f601cdda91d9cc