Merge "Collect libc++ headers that have no file name extensions" am: 462b91aae1

Original change: https://android-review.googlesource.com/c/platform/development/+/2473566

Change-Id: Ie89f023c62b1dc45a6eb921aa90fe321c810533f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>