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

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

Change-Id: Ic0b368083e6f98fb303f082c41adbb37fc00b145
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>