Revert "Revert "remove support for HWC < 1.0""

This reverts commit f59d36935358f0b176fdfff2b13855ec45ec63c8.

Conflicts:
	services/surfaceflinger/DisplayHardware/HWComposer.cpp

Change-Id: Ie81a60ed3b4dfa06319d8724d86887921b0d364a
Signed-off-by: DHO <DHO@dho.im>