Merge "Add prefetch directory in /metadata" into main am: 0582e461bc am: 17c537e75a

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3367707

Change-Id: I904870a28d314bf9a9e2098f91e594d55330f28a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>