Vulkan: Add missing initialization for mTotalMemorySize Looks like a bad merge. Bug: b/230538246 Change-Id: I66869ebb856606dc6acd5da4e919024efe62aa79 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3635159 Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com> Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com> Commit-Queue: Charlie Lao <cclao@google.com>