Vulkan: Account for padBuffersToMaxVertexAttribStride ... in BufferVk::shouldRedefineStorage. For vendors that require additional padding, redefine storage iff the padded size is greater than existing buffer size. Bug: b/271915956 Change-Id: I2acf2bb32f85b71bcfdba6919974dd2922ee787b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5512870 Commit-Queue: mohan maiya <m.maiya@samsung.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Charlie Lao <cclao@google.com>