Change RS to use the passed surface size rather than EGL size.

Its possible that during a resize the EGL information could be stale so
caching this is bad.  The surface size should always be correct.

Change-Id: Ifd479e1ea70b1cada1a8690c7c82e91aa391b685

Conflicts:

	libs/rs/rsProgramStore.cpp
	libs/rs/rsProgramStore.h