Vulkan: Add test for BufferData change is propagated to SSBO properly When BufferData is called while previous reference is still pending, ANGLE may allocate a new storage. When this happened, we need to ensure context gets notified so that it can pick up new buffer storage. Bug: b/195678877 Change-Id: Idb591ed49e7d2c9e2dc5803f65d00894687ae1d3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3076820 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Charlie Lao <cclao@google.com>