hwc2: present display

Presents the validated display. It is equivalent to calling HWC1's set.

Test: Add "TARGET_USES_HWC2 := true" to BoardConfig.mk.
      Recompile.
      Run testcases: https://android-review.googlesource.com/#/q/project:
            platform/frameworks/native+branch:master+topic:test-hwc2

Change-Id: Ib78be9df59ac1370b57cd4dae5412b15267b77b6
12 files changed