Add C++ wrapper for liburing am: 1bd2e5bf63

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/2240836

Change-Id: I19edbd5e0a43f5a622f9a553944affa228094457
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>