[M50_2661] Delegated Rendering using Surfaces and Surface Layer.

[M50_2661] Delegated Rendering using Surfaces and Surface Layer.

Delegated rendering was implemented with DelegatedRendererLayer.
DelegatedRendererLayer has been removed in M50 and Surfaces and
Surface Layer have been enabled by default. Due to this, rendering
failed and black screen was observed. With this commit, we adapt
delegated rendering accordingly.

This commit also removes dead code under TIZEN_DISABLE_GPU_THREAD.

Together with: Idd982f5731c82eb1fa689cc631643f157f67c957

Bug: http://suprem.sec.samsung.net/jira/browse/TWF-893

Reviewed by: dhyuna.ko, sm.venugopal, sns.park, venu.musham

Change-Id: Ic181ab6fe0bb691cc18e167c77169753c3f83b3c
Signed-off-by: Chandan Padhi <c.padhi@samsung.com>