Docs: Adding shader-compiler documentation to initial Vulkan doc set.
Docs: Adding shader-compiler documentation to initial Vulkan doc set.

Bug: 27396410
Change-Id: If38349ab08f5cf236f4637e2d2c141a803525f10

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base