Switch swapchain memory from AHB to GFX

What is the problem now ?
Swapchain needs to support ASTC format.

What is the root cause of the problem ?
Using the AHB API to allocate swapchian memory supports limited formats.

What is the solution ?
Switch to GFX memory.

What is the impact of the change ?
N/A.

What verification has been done ?
Helloxr sanity test.