Vulkan: Fix UBSan by initializing CopyImageParameters A sporadic UBSan crash was caused by reading 'copyYuvWithoutColorConversion' member from an uninitialized CopyImageParameters struct. Fix this by zero-initializing the 'params' variable at the call site in TextureVk.cpp Bug: b/446185698 Bug: b/445180744 Change-Id: I92db7a735b91df8603698bb2a33d95ec6d7556a7 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6965689 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Auto-Submit: Solti Ho <solti@google.com>