Move user file along to the new package name am: 578c0d3186 am: 9f13f0e3b3 am: 730a756498

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libcxx/+/19037861

Change-Id: I56b3ee8eb6d334b593ad337ffdbce5f87d5d7134
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>