Vulkan: Check that its okay to add commands It can be hard to tell sometimes when the mRenderPassCommands or mOutSideRenderPassCommands command buffers have changed and there have been some issues with code that locally caches a pointer to a commandBuffer that then becomes invalid. This change adds checking so that if a command is being added to a commandBuffer that's been closed (e.g. submitted for processing) then we hit an assert. Bug: b/168144059 Change-Id: If5d37c462e3bcb51f6ec2ca44c27a2fad4e57c19 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2405812 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>