hwc2: set layer dataspace

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: If5312312979e249ff36c28e06a2d6f4d4d4865f8
6 files changed