Revert "SurfaceFlinger: Change to support framebuffer flip for 2D blitters"

This reverts commit a270ff9622decbec25adfbbe66d30e01795caf4a.

Conflicts:

	services/surfaceflinger/DisplayHardware/HWComposer.cpp
	services/surfaceflinger/Layer.cpp
	services/surfaceflinger/SurfaceFlinger.cpp

Change-Id: Ife79fbfa8b50fc7fbbbcc81a401b2e4b05deadac