DisplayDevice: initialize mDisplayToken correctly

mDisplayToken should be initialized by displayToken.

Change-Id: I0a5fec1f1732200a32d10b1575239dceffe6dee4
Remove support for legacy HWC version encoding

Change-Id: If03ae1ebf10d15777310e1449a57473021390582
Merge "Remove support for legacy HWC version encoding"
Merge "DisplayDevice: initialize mDisplayToken correctly"
Gfx-3d: fix GetProcAddress in egl extention

This patch can fix issue when Proc address return NULL.
Glbench10, egl-ext and conformance test need this patch to run pass.

Change-Id: I275c7cb6f77cb334c3ee7fa23cd696bba1c5a458
Author: Liuhui Lu <liuhui.lu@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Author-tracking-BZ: 52622
Merge "Gfx-3d: fix GetProcAddress in egl extention"
Merge branch 'master' of https://android.googlesource.com/platform/frameworks/native into jb-4.2