Merge "libprefetch: library to prefetch data using tracing." into main am: e367550792

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3364432

Change-Id: I851a571a137a52c9ad9f8b6ef42d377e09281b61
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>