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

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

Change-Id: I2dda768b77849c4b291ac5d75e810283e33212eb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>