The error here was related to using a single cache variable for the
robust init setting for all the surfaces in a DisplayVk. Fix this by
passing down the robust init setting from the SurfaceVk to image init.

Bug: angleproject:5274
Change-Id: I9bc9c20990268d1d5166411fb53f8f2593fd1971
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2510694Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>