Merge changes I3fe46024,I5925dbc4,Iefb9f82d,I39643a75,I16f9e5fd, ...
* changes:
vulkan: Allow AHB extension to get to the driver
libvulkan: correctly expose VK_KHR_shared_presentable_image
Enable VK_KHR_swapchain for instances.
vkGetDeviceQueue2: add a NULL check
stubhal: add EnumeratePhysicalDeviceGroups
libvulkan: Add VK_ANDROID_external_memory_android_hardware_buffer
vulkan: Declare VK_ANDROID_external_memory_android_hardware_buffer
vulkan: update Vulkan headers to 1.1.68
Add VK1.1 entries to NDK libvulkan and fix a bug
Properly implement stubhal's vkGetInstanceProcAddr()
Vulkan1.1: CreateInstance downgrades apiVersion for 1.0 ICDs
Additional changes to Vulkan 1.1 API updates
Vulkan api update to 1.1