Update vulkan features (again) to support extension features.

We need to handle all the possible ways a client is allowed to initialize
features on Vulkan.

Bug: skia:
Change-Id: I98b1dee2efa2c22c26ce093c590c7ccd0b626969
Reviewed-on: https://skia-review.googlesource.com/145530
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
9 files changed