Have GrVkBackendContext take a VkPhysicalDeviceFeatures struct.

Bug: skia:
Change-Id: Ic7992c89c06789ee631c9f5b4f047c6486e792a5
Reviewed-on: https://skia-review.googlesource.com/137390
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
5 files changed