layers: Don't call driver if skip in PipelineBarrier
layers: Don't call driver if skip in PipelineBarrier

Change-Id: I9af6a641bc6e00f8ed3f1ea4cdf4f05321ecee6d

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools