Move EGLConfig selection to RenderEngine

Bug: 12230666
Change-Id: I8d1111a7e0fd9d9e2525e6a80da8ce46d7dd085d
Signed-off-by: Jesse Hall <jessehall@google.com>

Conflicts:
	services/surfaceflinger/SurfaceFlinger.cpp
Implement per-display EGLConfig and configless EGLContext

Bug: 12230666
Change-Id: Icca608b108cbdcab9cf01a9236d8cdbda000a836
Signed-off-by: Jesse Hall <jessehall@google.com>