Merge "Vulkan: load built-in driver into default namespace as a fallback" am: d95f8b185e

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1533040

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5c9fdbf53cb94641c397f699d3934853558bdc25