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

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

Change-Id: I2f9688cd5575051ea5f9e61ebe9b634d8c80f2f2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>