When a texture's base or max mipmap level is changed, ANGLE creates a
new VkTexture (and potentially copies lots of data old->staging
buffer->new).  However, ANGLE wasn't looking at the texture's format,
and for a compressed format ANGLE wasn't looking at/using the texture
format's compressed block width and height.

Bug: b/155499736
Change-Id: I11a12028aee998fa23d503c2c0db39fbb49ae6ec
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2180881
Commit-Queue: Ian Elliott <ianelliott@google.com>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>