exynos4: getphys implementation on buffermanager for samsung omx

Change-Id: Iee665f56aaf601479d796703db983ca5fce9c5c3

Conflicts:
	include/media/hardware/HardwareAPI.h
	include/ui/GraphicBufferMapper.h
	libs/ui/GraphicBufferMapper.cpp
ui: exynos4: getphys is common

Change-Id: I1dc9c2ced0700072e7c30c8435676873b10c7026

Conflicts:
	include/ui/GraphicBufferMapper.h
	libs/ui/GraphicBufferMapper.cpp