Move user file along to the new package name am: 578c0d3186 am: edd250a3d2

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

Change-Id: Ic3309b03a80f59e25e3fe4f3ae9435749436ceae
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>