Vulkan: Fixed assert in DedicatedCommandBlockPool onNewCommand() It is valid to allocate "kBlockSize" bytes. Bug: b/256666069 Change-Id: I0cd37a450af3de476c05e7681f32cdae5916d56b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4227071 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Charlie Lao <cclao@google.com>