Merge "libc++fs is part of libc++ now." into main am: a22a7ccba5 am: 7754532eae

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/3113941

Change-Id: I205ae13d682626179d6720ab967306a5ea1aa107
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>