Fix initialization of GrVkCaps when using legacy extension flags.

Bug: chromium:958000
Change-Id: I2f844d7acded88d37902e387bcfabd1ab82386f3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/211362
Commit-Queue: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: Greg Daniel <egdaniel@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
2 files changed